Three blocks with masses of 1 kg,2 kg,and 3 kg are sliding down a plane inclined at an angle $\theta$ = 25S1U1P1$\circ$S1S1P0.If the coefficient of kinetic friction is the same for each of the blocks,which block has the greatest acceleration along the plane?

A) They all have the same acceleration B) the 1-kg block C) the 2-kg block D) the 3-kg block E) the 2- and 3-kg blocks A) They all have the same acceleration B) the 1-kg block C) the 2-kg block D) the 3-kg block E) the 2- and 3-kg blocks

Consider two blocks hung by a massless string from a frictionless pulley as shown in the figure.The masses of the blocks are m1=5 kg and m2=7 kg.The bottoms of the blocks are 20 meters above the top of the table.While m2 is moving downward,what is the magnitude of its acceleration (within 5% accuracy)?

A) 9.8 m/s2 B) 2.8 m/s2 C) 7.0 m/s2 D) 0 m/s2 E) 1.6 m/s2 A) 9.8 m/s2 B) 2.8 m/s2 C) 7.0 m/s2 D) 0 m/s2 E) 1.6 m/s2

Force vector A has a length of 5 N and an angle of 30S1U1P1$\circ$S1S1P0 with respect to the positive x-axis.Force vector B has a length of 5 N and an angle of 150S1U1P1$\circ$S1S1P0 with respect to the positive x-axis.What is the direction of a third force vector which must be added to A and B in order to make the net force equal to zero? (All three forces act on the same object).

A) 0o B) 90o C) 180o D) 270o E) None of the above are correct. A) 0o B) 90o C) 180o D) 270o E) None of the above are correct.

Consider two blocks hung by a massless string from a frictionless pulley as shown in the figure.The masses of the blocks are m1=5 kg and m2=7 kg.The bottoms of the blocks are 20 meters above the top of the table.What is the speed of m2 just before it strikes the table 20 meters below its starting point (within 5% accuracy)?

A) 22 m/s B) 8.1 m/s C) 20.m/s D) 11.m/s E) 1.7 m/s A) 22 m/s B) 8.1 m/s C) 20.m/s D) 11.m/s E) 1.7 m/s

Exam 4: Force | Examlex

In the figure,a force F is being applied to the block with a magnitude such that it moves up along the frictionless inclined place with a constant velocity of 5 m/s.The angle in the figure is 30^$\circ$,and the mass of the block is 50 kg.What is the normal force exerted by the inclined plane on the block (within 5% accuracy)? $In the figure,a force F is being applied to the block with a magnitude such that it moves up along the frictionless inclined place with a constant velocity of 5 m/s.The angle in the figure is 30<sup> \circ </sup>,and the mass of the block is 50 kg.What is the normal force exerted by the inclined plane on the block (within 5% accuracy)?$

(Multiple Choice)

4.8/5

(27)

Question 41

A 100-kg object moves on a level surface with a coefficient of friction of 0.40.If the initial velocity is 15 m/s,how far will it travel before coming to rest?

(Multiple Choice)

4.9/5

(34)

Question 42

A package rests on the back seat of your car.The coefficient of friction between the seat and the package is 0.24.Assuming you drive on a level road,what is the maximum acceleration your car can have if the package is to remain in place relative to your back seat?

(Multiple Choice)

4.7/5

(32)

Question 43

As shown in the figure,a person standing on the floor pulls on a rope with a force F at an angle of (with respect to the positive x axis)in order to raise a weight of 30 N with pulleys.It is raised at a constant velocity.Consider the rope as massless and the pulleys as frictionless.(The mass hanging from the lower pulley does not interfere with the movement of the pulley.)What is the tension in the rope (within 5% accuracy)?

(Multiple Choice)

4.9/5

(48)

Question 44

Three blocks with masses of 1 kg,2 kg,and 3 kg are sliding down a plane inclined at an angle $\theta$ = 25^$\circ$.If the coefficient of kinetic friction is the same for each of the blocks,which block has the greatest acceleration along the plane?

(Multiple Choice)

4.9/5

(34)

Question 45

A sky diver has jumped from a plane and achieved a nearly constant velocity as she falls.Which statement below correctly explains how this happened.

(Multiple Choice)

4.7/5

(31)

Question 46

What determines the magnitude of the force of static friction on an object at rest at all times on a flat level horizontal surface being pushed to the right by another solid object?

(Multiple Choice)

4.8/5

(33)

Question 47

Two masses,m₁= 3.0 kg and m₂ = 4.0 kg rest on a frictionless surface as shown.A force of 7.0 N is applied to m₁.What is the acceleration of the two masses?

(Multiple Choice)

4.9/5

(34)

Question 48

A 1.23-kg box slides down an incline plane with a speed of 8.6 m/s.If the angle of the plane with respect to the horizontal is 11 degrees and the coefficient of friction is 0.33,how long will it take for the box to come to rest?

(Multiple Choice)

4.8/5

(38)

Question 49

Consider two blocks hung by a massless string from a frictionless pulley as shown in the figure.The masses of the blocks are m₁=5 kg and m₂=7 kg.The bottoms of the blocks are 20 meters above the top of the table.While m₂ is moving downward,what is the magnitude of its acceleration (within 5% accuracy)?

(Multiple Choice)

4.8/5

(32)

Question 50

A 65-kg skydiver falls with a terminal velocity of 50 m/s.What is the magnitude of the net force acting on the skydiver?

(Multiple Choice)

5.0/5

(41)

Question 51

The two blocks in the figure have masses M₁ and M₂ such that M₁ < M₂ and they lay on a level,frictionless surface.We can apply a horizontal force F either from the left or from the right,as depicted in the figure.The contact force between masses M₁ and M₂ is

(Multiple Choice)

4.8/5

(45)

Question 52

A person with a mass of 50 kg is standing on a scale in an elevator that is accelerating upwards at a rate of 3.2 m/s².What is the reading on the scale (the apparent weight)?

(Multiple Choice)

4.8/5

(32)

Question 53

A mass m₁ of 3.00 kg slides on a frictionless surface.This mass is connected to another mass m₂ of 1.50 kg by a massless string over a frictionless pulley.The masses are held motionless and then released.What is the acceleration of m₁ in m/s²?

(Multiple Choice)

4.7/5

(43)

Question 54

Force vector A has a length of 5 N and an angle of 30^$\circ$ with respect to the positive x-axis.Force vector B has a length of 5 N and an angle of 150^$\circ$ with respect to the positive x-axis.What is the direction of a third force vector which must be added to A and B in order to make the net force equal to zero? (All three forces act on the same object).

(Multiple Choice)

4.8/5

(39)

Question 55

Four weights,of masses m₁ = 3.00 kg,m₂ = 1.00 kg,m₃ = 4.00 kg,m₄ = 2.00 kg,are hanging from the ceiling as shown.They are connected to each other with ropes.The tension in the rope connecting the masses m₁ and m₂ is

(Multiple Choice)

4.9/5

(45)

Question 56

At the county fair,a greased pig is slid up a long ramp that is inclined above the horizontal.Assuming his pork belly slides frictionlessly along the ramp,and that he is projected from the very bottom of the ramp,travelling up the ramp 7.5 m before he momentarily stops and reverses course,what is the angle of inclination if his initial speed is 7.5 m/s?

(Multiple Choice)

4.9/5

(38)

Question 57

A 0.5-kg model helicopter initially at rest on the ground,starts to move directly up under the effect of a lift force of magnitude of 7.4 N.After 12 seconds the engine stops and the helicopter starts free fall.Ignoring air resistance,calculate the helicopter's velocity just as the engine stops.

(Multiple Choice)

4.9/5

(37)

Question 58

Consider two blocks hung by a massless string from a frictionless pulley as shown in the figure.The masses of the blocks are m₁=5 kg and m₂=7 kg.The bottoms of the blocks are 20 meters above the top of the table.What is the speed of m₂ just before it strikes the table 20 meters below its starting point (within 5% accuracy)?

(Multiple Choice)

4.7/5

(39)

Question 59

A 10-kg and a 4-kg mass are acted on by the same size net force (which remains constant)for the same period of time.Which one of the following statements is true?

(Multiple Choice)

4.9/5

(36)

Question 60

Showing 41 - 60 of 86

Exam 4: Force

A 100-kg object moves on a level surface with a coefficient of friction of 0.40.If the initial velocity is 15 m/s,how far will it travel before coming to rest?

A package rests on the back seat of your car.The coefficient of friction between the seat and the package is 0.24.Assuming you drive on a level road,what is the maximum acceleration your car can have if the package is to remain in place relative to your back seat?

Three blocks with masses of 1 kg,2 kg,and 3 kg are sliding down a plane inclined at an angle θ\thetaθ = 25 ∘\circ∘ .If the coefficient of kinetic friction is the same for each of the blocks,which block has the greatest acceleration along the plane?

A sky diver has jumped from a plane and achieved a nearly constant velocity as she falls.Which statement below correctly explains how this happened.

What determines the magnitude of the force of static friction on an object at rest at all times on a flat level horizontal surface being pushed to the right by another solid object?

Two masses,m1= 3.0 kg and m2 = 4.0 kg rest on a frictionless surface as shown.A force of 7.0 N is applied to m1.What is the acceleration of the two masses?

A 1.23-kg box slides down an incline plane with a speed of 8.6 m/s.If the angle of the plane with respect to the horizontal is 11 degrees and the coefficient of friction is 0.33,how long will it take for the box to come to rest?

A 65-kg skydiver falls with a terminal velocity of 50 m/s.What is the magnitude of the net force acting on the skydiver?

The two blocks in the figure have masses M1 and M2 such that M1 < M2 and they lay on a level,frictionless surface.We can apply a horizontal force F either from the left or from the right,as depicted in the figure.The contact force between masses M1 and M2 is

A person with a mass of 50 kg is standing on a scale in an elevator that is accelerating upwards at a rate of 3.2 m/s2.What is the reading on the scale (the apparent weight)?

A mass m1 of 3.00 kg slides on a frictionless surface.This mass is connected to another mass m2 of 1.50 kg by a massless string over a frictionless pulley.The masses are held motionless and then released.What is the acceleration of m1 in m/s2?

Four weights,of masses m1 = 3.00 kg,m2 = 1.00 kg,m3 = 4.00 kg,m4 = 2.00 kg,are hanging from the ceiling as shown.They are connected to each other with ropes.The tension in the rope connecting the masses m1 and m2 is

A 0.5-kg model helicopter initially at rest on the ground,starts to move directly up under the effect of a lift force of magnitude of 7.4 N.After 12 seconds the engine stops and the helicopter starts free fall.Ignoring air resistance,calculate the helicopter's velocity just as the engine stops.

A 10-kg and a 4-kg mass are acted on by the same size net force (which remains constant)for the same period of time.Which one of the following statements is true?

Overview

Motion in a Straight Line

Motion in Two and Three Dimensions

Kinetic Energy, work, and Power

Potential Energy and Energy Conservation

Momentum and Collisions

Systems of Particles and Extended Objects

Circular Motion

Rotation

Static Equilibrium

Gravitation

Solids and Fluids

Oscillations

Waves

Sound

Temperature

Heat and the First Law of Thermodynamics

Ideal Gases

The Second Law of Thermodynamics

Electrostatics

Electric Fields and Gausss Law

Electric Potential

Capacitors

Current and Resistance

Direct Current Circuits

Magnetism

Magnetic Fields of Moving Charges

Electromagnetic Induction

Alternating Current Circuits

Electromagnetic Waves

Geometric Optics

Lenses and Optical Instruments

Wave Optics

Relativity

Quantum Physics

Quantum Mechanics

Atomic Physics

Elementary Particle Physics

Nuclear Physics

Filters

Three blocks with masses of 1 kg,2 kg,and 3 kg are sliding down a plane inclined at an angle $\theta$ = 25^$\circ$.If the coefficient of kinetic friction is the same for each of the blocks,which block has the greatest acceleration along the plane?

Two masses,m₁= 3.0 kg and m₂ = 4.0 kg rest on a frictionless surface as shown.A force of 7.0 N is applied to m₁.What is the acceleration of the two masses?

The two blocks in the figure have masses M₁ and M₂ such that M₁ < M₂ and they lay on a level,frictionless surface.We can apply a horizontal force F either from the left or from the right,as depicted in the figure.The contact force between masses M₁ and M₂ is

A person with a mass of 50 kg is standing on a scale in an elevator that is accelerating upwards at a rate of 3.2 m/s².What is the reading on the scale (the apparent weight)?

A mass m₁ of 3.00 kg slides on a frictionless surface.This mass is connected to another mass m₂ of 1.50 kg by a massless string over a frictionless pulley.The masses are held motionless and then released.What is the acceleration of m₁ in m/s²?

Four weights,of masses m₁ = 3.00 kg,m₂ = 1.00 kg,m₃ = 4.00 kg,m₄ = 2.00 kg,are hanging from the ceiling as shown.They are connected to each other with ropes.The tension in the rope connecting the masses m₁ and m₂ is