A cart of weight 60 N is accelerated across a level surface at 0.15 m/s2.What net force acts on the cart? (g = 9.8 m/s2)

A) 0.92 N B) 0.31 N C) 3.0 N D) 4.5 N A) 0.92 N B) 0.31 N C) 3.0 N D) 4.5 N

A drag racer starts from rest and accelerates at 8.0 m/s2 for the entire distance of 400 m (1/4 mile).What is the speed of the race car at the end of the run?

A) 32 m/s B) 40 m/s C) 64 m/s D) 80 m/s A) 32 m/s B) 40 m/s C) 64 m/s D) 80 m/s

A water rocket,launched from the ground,rises vertically with acceleration of 20 m/s2 for 1.0 s when it runs out of "fuel." Disregarding air resistance,how high will the rocket rise?

A) 15 m B) 30 m C) 61 m D) 102 m A) 15 m B) 30 m C) 61 m D) 102 m

Exam 3: Vectors and Two-Dimensional Motion: Part A

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A rock is thrown straight up with an initial velocity of 30.0 m/s.What maximum height will the rock reach before starting to fall downward? (Acceleration due to gravity is 9.80 m/s². )

(Multiple Choice)

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Question 41

Rita accelerates a 0.40-kg ball from rest to 12 m/s during the 0.15 s in which her foot is in contact with the ball.What average force does she apply to the ball during the kick?

(Multiple Choice)

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Question 42

A rock is thrown straight down with an initial velocity of 17.5 m/s from a cliff.What is the rock's displacement after 2.0 s? (Acceleration due to gravity is 9.80 m/s². )

(Multiple Choice)

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Question 43

A cart of weight 60 N is accelerated across a level surface at 0.15 m/s².What net force acts on the cart? (g = 9.8 m/s²)

(Multiple Choice)

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Question 44

A Cessna aircraft has a liftoff speed of 120 km/hr.What minimum constant acceleration does this require if the aircraft is to be airborne after a takeoff run of 200 m?

(Multiple Choice)

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(42)

Question 45

A 70.0-kg man jumps 1.00 m down onto a concrete walkway.His downward motion stops in 0.04 seconds.If he forgets to bend his knees,what force is transmitted to his leg bones?

(Multiple Choice)

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Question 46

An elevator weighing 20,000 N is supported by a steel cable.What is the tension in the cable when the elevator is being accelerated upward at a rate of 2.00 m/s²? (g = 9.80 m/s²)

(Multiple Choice)

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Question 47

A speeding car traveling at a constant velocity of v passes a police car initially at rest beside the roadway.If the police car with constant acceleration of a immediately pursues the speeding car,how long is it before the police car is directly behind the speeding car?

(Multiple Choice)

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Question 48

A European sports car dealer claims that his product will accelerate at a constant rate from rest to a speed of 100 km/hr in 9.00 s.What distance will the sports car travel during the 9.00 s acceleration period? (Hint: First convert speed to m/s. )

(Multiple Choice)

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Question 49

A drag racer starts from rest and accelerates at 8.0 m/s² for the entire distance of 400 m (1/4 mile).What is the speed of the race car at the end of the run?

(Multiple Choice)

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(31)

Question 50

Hector drives a pickup truck horizontally at 15.0 m/s.He is transporting a crate of delicate lead crystal.If the coefficient of static friction between the crate and the truck bed is 0.300,what is the minimum stopping distance for the truck so the crate will not slide?

(Multiple Choice)

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Question 51

A physics class in a large lecture hall has 15 students.The total mass of the students is about _____ kg.(You will need to make a reasonable estimate of a missing physical quantity. )

(Multiple Choice)

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Question 52

Doug hits a hockey puck,giving it an initial velocity of 7.0 m/s.If the coefficient of kinetic friction between ice and puck is 0.050,how far will the puck slide before stopping?

(Multiple Choice)

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Question 53

A water rocket,launched from the ground,rises vertically with acceleration of 20 m/s² for 1.0 s when it runs out of "fuel." Disregarding air resistance,how high will the rocket rise?

(Multiple Choice)

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Question 54

A ball is thrown vertically upwards at 29.4 m/s.For its complete trip (up and back down to the starting position),its average speed is:

(Multiple Choice)

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Question 55

Omar throws a rock down with speed 2.0 m/s from the top of a tower.The rock hits the ground after 2.0 s.What is the height of the tower? (air resistance is negligible)

(Multiple Choice)

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Question 56

A steel sphere of mass M has a large spherical cavity inside.A second solid steel sphere has mass 4M,but has the same outer radius as the first sphere.If the terminal velocity of the first sphere is v,what would be the terminal velocity of the second sphere?

(Multiple Choice)

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Question 57

A rock is rolled in the sand.It starts at 5.0 m/s,moves in a straight line for a distance of 6.0 m,and then stops.What is the magnitude of the average acceleration?

(Multiple Choice)

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Question 58

Three identical 3.0-kg cubes are placed on a horizontal surface in contact with one another.The cubes are lined up from left to right and an 18-N force is applied to the left side of the left cube causing all three cubes to accelerate to the right.If the cubes are each subject to a frictional force of 3.0 N,what is the magnitude of the force exerted on the middle cube by the left cube in this case?

(Multiple Choice)

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Question 59

A speeding car traveling at a constant velocity of 24 m/s passes a police care initially at rest beside the roadway.If the police car with constant acceleration of 3.0 m/s² immediately pursues the speeding car,how far down the road does it draw even with the speeding car?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 64

Exam 3: Vectors and Two-Dimensional Motion: Part A

A rock is thrown straight up with an initial velocity of 30.0 m/s.What maximum height will the rock reach before starting to fall downward? (Acceleration due to gravity is 9.80 m/s2. )

Rita accelerates a 0.40-kg ball from rest to 12 m/s during the 0.15 s in which her foot is in contact with the ball.What average force does she apply to the ball during the kick?

A rock is thrown straight down with an initial velocity of 17.5 m/s from a cliff.What is the rock's displacement after 2.0 s? (Acceleration due to gravity is 9.80 m/s2. )

A cart of weight 60 N is accelerated across a level surface at 0.15 m/s2.What net force acts on the cart? (g = 9.8 m/s2)

A Cessna aircraft has a liftoff speed of 120 km/hr.What minimum constant acceleration does this require if the aircraft is to be airborne after a takeoff run of 200 m?

A 70.0-kg man jumps 1.00 m down onto a concrete walkway.His downward motion stops in 0.04 seconds.If he forgets to bend his knees,what force is transmitted to his leg bones?

An elevator weighing 20,000 N is supported by a steel cable.What is the tension in the cable when the elevator is being accelerated upward at a rate of 2.00 m/s2? (g = 9.80 m/s2)

A speeding car traveling at a constant velocity of v passes a police car initially at rest beside the roadway.If the police car with constant acceleration of a immediately pursues the speeding car,how long is it before the police car is directly behind the speeding car?

A European sports car dealer claims that his product will accelerate at a constant rate from rest to a speed of 100 km/hr in 9.00 s.What distance will the sports car travel during the 9.00 s acceleration period? (Hint: First convert speed to m/s. )

A drag racer starts from rest and accelerates at 8.0 m/s2 for the entire distance of 400 m (1/4 mile).What is the speed of the race car at the end of the run?

Hector drives a pickup truck horizontally at 15.0 m/s.He is transporting a crate of delicate lead crystal.If the coefficient of static friction between the crate and the truck bed is 0.300,what is the minimum stopping distance for the truck so the crate will not slide?

A physics class in a large lecture hall has 15 students.The total mass of the students is about _____ kg.(You will need to make a reasonable estimate of a missing physical quantity. )

Doug hits a hockey puck,giving it an initial velocity of 7.0 m/s.If the coefficient of kinetic friction between ice and puck is 0.050,how far will the puck slide before stopping?

A water rocket,launched from the ground,rises vertically with acceleration of 20 m/s2 for 1.0 s when it runs out of "fuel." Disregarding air resistance,how high will the rocket rise?

A ball is thrown vertically upwards at 29.4 m/s.For its complete trip (up and back down to the starting position),its average speed is:

Omar throws a rock down with speed 2.0 m/s from the top of a tower.The rock hits the ground after 2.0 s.What is the height of the tower? (air resistance is negligible)

A steel sphere of mass M has a large spherical cavity inside.A second solid steel sphere has mass 4M,but has the same outer radius as the first sphere.If the terminal velocity of the first sphere is v,what would be the terminal velocity of the second sphere?

A rock is rolled in the sand.It starts at 5.0 m/s,moves in a straight line for a distance of 6.0 m,and then stops.What is the magnitude of the average acceleration?

A speeding car traveling at a constant velocity of 24 m/s passes a police care initially at rest beside the roadway.If the police car with constant acceleration of 3.0 m/s2 immediately pursues the speeding car,how far down the road does it draw even with the speeding car?

Introduction

Introduction: Part A

Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

The Laws of Motion

The Laws of Motion: Part A

Energy

Energy: Part A

Momentum and Collisions

Momentum and Collisions: Part A

Rotational Motion and the Law of Gravity

Rotational Motion and the Law of Gravity: Part A

Rotational Equilibrium and Rotational Dynamics

Rotational Equilibrium and Rotational Dynamics: Part A

Solids and Fluids

Solids and Fluids: Part A

Thermal Physics

Thermal Physics: Part A

Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

The Laws of Thermodynamics Work in Thermodynamic Processes

The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

Vibrations and Waves

Vibrations and Waves: Part A

Sound

Sound: Part A

Electric Forces and Electric Fields

Electric Forces and Electric Fields: Part A

Electrical Energy and Capacitance

Electrical Energy and Capacitance: Part A

Current and Resistance Electric Current

Current and Resistance Electric Current: Part A

Direct-Current Circuits Sources of EMF

Direct-Current Circuits Sources of EMF: Part A

Magnetism Magnets

Magnetism Magnets: Part A

Induced Voltages and Inductance

Induced Voltages and Inductance: Part A

Alternating-Current Circuits and Electromagnetic Waves

Alternating-Current Circuits and Electromagnetic Waves: Part A

Reflection and Refraction of Light

Reflection and Refraction of Light: Part A

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics

Wave Optics: Part A

Optical Instruments

Optical Instruments: Part A

Relativity

Relativity: Part A

Quantum Physics Blackbody Radiation and Plancks Hypothesis

Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

Atomic Physics

Atomic Physics: Part A

Nuclear Physics

Nuclear Physics: Part A

Nuclear Energy and Elementary Particles

Nuclear Energy and Elementary Particles: Part A

Particle Collisions, Mediating Photons, and Quark Structures: Exploring the Fundamentals of Physics

A rock is thrown straight up with an initial velocity of 30.0 m/s.What maximum height will the rock reach before starting to fall downward? (Acceleration due to gravity is 9.80 m/s². )

A rock is thrown straight down with an initial velocity of 17.5 m/s from a cliff.What is the rock's displacement after 2.0 s? (Acceleration due to gravity is 9.80 m/s². )

A cart of weight 60 N is accelerated across a level surface at 0.15 m/s².What net force acts on the cart? (g = 9.8 m/s²)

An elevator weighing 20,000 N is supported by a steel cable.What is the tension in the cable when the elevator is being accelerated upward at a rate of 2.00 m/s²? (g = 9.80 m/s²)

A drag racer starts from rest and accelerates at 8.0 m/s² for the entire distance of 400 m (1/4 mile).What is the speed of the race car at the end of the run?

A water rocket,launched from the ground,rises vertically with acceleration of 20 m/s² for 1.0 s when it runs out of "fuel." Disregarding air resistance,how high will the rocket rise?

A speeding car traveling at a constant velocity of 24 m/s passes a police care initially at rest beside the roadway.If the police car with constant acceleration of 3.0 m/s² immediately pursues the speeding car,how far down the road does it draw even with the speeding car?