A rope exerts a force on a 20.0-kg crate.The crate starts from rest and accelerates upward at 5.00 m/sS1U1P12S1S1P0 near the surface of the earth. -How much work was done by the force in raising the crate 4.0 m above the floor?

A) 399 J B) 250 J C) 116 J D) 704 J E) 1180 J A) 399 J B) 250 J C) 116 J D) 704 J E) 1180 J E

A 0.50-kg ball on the end of a rope is moving in a vertical circle of radius 3.0 m near the surface of the Earth where the acceleration due to gravity, g, is 9.8 m/sS1U1P12S1S1P0.Point A is at the top of the circle; C is at the bottom.Points B and D are exactly halfway between A and C. -Which one of the following statements concerning the tension in the rope is true?

A) The tension is smallest at A. B) The tension is smallest at C. C) The tension is smallest at both B and D. D) The tension is the same at A and C. E) The tension is the same at A, B, C, and D. A) The tension is smallest at A. B) The tension is smallest at C. C) The tension is smallest at both B and D. D) The tension is the same at A and C. E) The tension is the same at A, B, C, and D.

Exam 6: Work and Energy

A 325-N force accelerates a 50.0-kg crate from rest along a horizontal frictionless surface for a distance of 20.0 m as shown in the figure. -What is the final speed of the crate?

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Question 1

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A rope exerts a force on a 20.0-kg crate.The crate starts from rest and accelerates upward at 5.00 m/s² near the surface of the earth. -How much work was done by the force in raising the crate 4.0 m above the floor?

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Question 2

Correct Answer:

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A 325-N force accelerates a 50.0-kg crate from rest along a horizontal frictionless surface for a distance of 20.0 m as shown in the figure. -How much work is done on the crate?

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Question 3

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An engineer is asked to design a playground slide such that the speed a child reaches at the bottom does not exceed 6.0 m/s. Determine the maximum height that the slide can be.

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Question 4

Julie carries an 8.0-kg suitcase as she walks 18 m along a horizontal walkway to her hotel room at a constant speed of 1.5 m/s.How much work does Julie do in carrying her suitcase?

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Question 5

Two boxes are connected to each other as shown.The system is released from rest and the 1.00-kg box falls through a distance of 1.00 m.The surface of the table is frictionless.What is the kinetic energy of box B just before it reaches the floor?

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Question 6

A 325-N force accelerates a 50.0-kg crate from rest along a horizontal frictionless surface for a distance of 20.0 m as shown in the figure. -What coefficient of friction would be required to keep the crate moving at constant speed under the action of the 325-N force?

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Question 7

What is the kinetic energy of the crate as it slides on the lower surface?

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Question 8

A 0.50-kg ball on the end of a rope is moving in a vertical circle of radius 3.0 m near the surface of the Earth where the acceleration due to gravity, g, is 9.8 m/s².Point A is at the top of the circle; C is at the bottom.Points B and D are exactly halfway between A and C. -The ball moves on the circle from A to C under the influence of gravity alone.If the kinetic energy of the ball is 35 J at A, what is its kinetic energy at C?

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Question 9

Larry's gravitational potential energy is 1870 J as he sits 2.20 m above the ground in a sky diving airplane before it takes off.What is Larry's gravitational potential energy when be begins to jump from the airplane at an altitude of 923 m?

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Question 10

The force component acting on an object along the displacement varies with the displacement s as shown in the graph.Determine the work done on the object as it travels from s= 0.0 to 12 m.

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Question 11

What minimum coefficient of kinetic friction is required to bring the crate to a stop over a distance of 5.0 m along the lower surface?

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Question 12

A 0.50-kg ball on the end of a rope is moving in a vertical circle of radius 3.0 m near the surface of the Earth where the acceleration due to gravity, g, is 9.8 m/s².Point A is at the top of the circle; C is at the bottom.Points B and D are exactly halfway between A and C. -Which one of the following statements concerning the tension in the rope is true?

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Question 13

A top fuel dragster with a mass of 500.0 kg starts from rest and completes a quarter mile (402 m) race in a time of 5.0 s.The dragster's final speed is 130 m/s.Neglecting friction, what average power was needed to produce this final speed?

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Question 14

Mike is cutting the grass using a human-powered lawn mower.He pushes the mower with a force of 45 N directed at an angle of 41° below the horizontal direction.Calculate the work that Mike does on the mower each time he pushes it 9.1 m across the yard.

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Question 15

The graph shows the force component along the displacement as a function of the magnitude of the displacement.Determine the work done by the force during the interval from 2 to 10 m.

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Question 16

A 9.0-kg box of oranges slides from rest down a frictionless incline from a height of 5.0 m.A constant frictional force, introduced at point A, brings the block to rest at point B, 19 m to the right of point A. $A 9.0-kg box of oranges slides from rest down a frictionless incline from a height of 5.0 m.A constant frictional force, introduced at point A, brings the block to rest at point B, 19 m to the right of point A. -What is the coefficient of kinetic friction, \mu <sub>k</sub>, of the surface from A to B?$ -What is the coefficient of kinetic friction, $\mu$ _k, of the surface from A to B?

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Question 17

A care package is dropped from rest from a helicopter hovering 25 m above the ground.What is the speed of the package just before it reaches the ground? Neglect air resistance.

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Question 18

A concrete block is pulled 7.0 m across a frictionless surface by means of a rope.The tension in the rope is 40 N; and the net work done on the block is 247 J.What angle does the rope make with the horizontal?

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Question 19

A 12.5-kg crate slides along a horizontal frictionless surface at a constant speed of 4.0 m/s.The crate then slides down a frictionless incline and across a second horizontal surface as shown in the figure. -What is the kinetic energy of the crate as it slides on the upper surface?

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Question 20

Showing 1 - 20 of 78

Exam 6: Work and Energy

A 325-N force accelerates a 50.0-kg crate from rest along a horizontal frictionless surface for a distance of 20.0 m as shown in the figure. -What is the final speed of the crate?

A rope exerts a force on a 20.0-kg crate.The crate starts from rest and accelerates upward at 5.00 m/s2 near the surface of the earth. -How much work was done by the force in raising the crate 4.0 m above the floor?

A 325-N force accelerates a 50.0-kg crate from rest along a horizontal frictionless surface for a distance of 20.0 m as shown in the figure. -How much work is done on the crate?

An engineer is asked to design a playground slide such that the speed a child reaches at the bottom does not exceed 6.0 m/s. Determine the maximum height that the slide can be.

Julie carries an 8.0-kg suitcase as she walks 18 m along a horizontal walkway to her hotel room at a constant speed of 1.5 m/s.How much work does Julie do in carrying her suitcase?

Two boxes are connected to each other as shown.The system is released from rest and the 1.00-kg box falls through a distance of 1.00 m.The surface of the table is frictionless.What is the kinetic energy of box B just before it reaches the floor?

A 325-N force accelerates a 50.0-kg crate from rest along a horizontal frictionless surface for a distance of 20.0 m as shown in the figure. -What coefficient of friction would be required to keep the crate moving at constant speed under the action of the 325-N force?

What is the kinetic energy of the crate as it slides on the lower surface?

Larry's gravitational potential energy is 1870 J as he sits 2.20 m above the ground in a sky diving airplane before it takes off.What is Larry's gravitational potential energy when be begins to jump from the airplane at an altitude of 923 m?

The force component acting on an object along the displacement varies with the displacement s as shown in the graph.Determine the work done on the object as it travels from s = 0.0 to 12 m.

What minimum coefficient of kinetic friction is required to bring the crate to a stop over a distance of 5.0 m along the lower surface?

A top fuel dragster with a mass of 500.0 kg starts from rest and completes a quarter mile (402 m) race in a time of 5.0 s.The dragster's final speed is 130 m/s.Neglecting friction, what average power was needed to produce this final speed?

Mike is cutting the grass using a human-powered lawn mower.He pushes the mower with a force of 45 N directed at an angle of 41° below the horizontal direction.Calculate the work that Mike does on the mower each time he pushes it 9.1 m across the yard.

The graph shows the force component along the displacement as a function of the magnitude of the displacement.Determine the work done by the force during the interval from 2 to 10 m.

A 9.0-kg box of oranges slides from rest down a frictionless incline from a height of 5.0 m.A constant frictional force, introduced at point A, brings the block to rest at point B, 19 m to the right of point A. -What is the coefficient of kinetic friction, μ\muμ k, of the surface from A to B?

A care package is dropped from rest from a helicopter hovering 25 m above the ground.What is the speed of the package just before it reaches the ground? Neglect air resistance.

A concrete block is pulled 7.0 m across a frictionless surface by means of a rope.The tension in the rope is 40 N; and the net work done on the block is 247 J.What angle does the rope make with the horizontal?

A 12.5-kg crate slides along a horizontal frictionless surface at a constant speed of 4.0 m/s.The crate then slides down a frictionless incline and across a second horizontal surface as shown in the figure. -What is the kinetic energy of the crate as it slides on the upper surface?

Introduction and Mathematical Concepts

Kinematics in One Dimension

Kinematics in Two Dimensions

Forces and Newtons Laws of Motion

Dynamics of Uniform Circular Motion

Impulse and Momentum

Rotational Kinematics

Rotational Dynamics

Simple Harmonic Motion and Elasticity

Fluids

Temperature and Heat

The Transfer of Heat

The Ideal Gas Law and Kinetic Theory

Thermodynamics

Waves and Sound

The Principle of Linear Superposition and Interference Phenomena

Electric Forces and Electric Fields

Electric Potential Energy and the Electric Potential

Electric Circuits

Magnetic Forces and Magnetic Fields

Electromagnetic Induction

Alternating Current Circuits

Electromagnetic Waves

The Reflection of Light: Mirrors

The Refraction of Light: Lenses and Optical Instruments

Interference and the Wave Nature of Light

Special Relativity

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The Nature of the Atom

Nuclear Physics and Radioactivity

Ionizing Radiation, Nuclear Energy, and Elementary Particles

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A rope exerts a force on a 20.0-kg crate.The crate starts from rest and accelerates upward at 5.00 m/s² near the surface of the earth. -How much work was done by the force in raising the crate 4.0 m above the floor?

The force component acting on an object along the displacement varies with the displacement s as shown in the graph.Determine the work done on the object as it travels from s= 0.0 to 12 m.