A 10-kg box is pushed up a plane inclined at 37º with the horizontal. The box starts from rest and is pushed 5 m along the incline with a uniform acceleration of 2 m/s2. The coefficient of kinetic friction is 0.20 and the pushing force is parallel to the plane. The increase in the potential energy of the box is

A) 0.10 kJ B) 0.29 kJ C) 0.36 kJ D) 0.46 kJ E) 0.39 kJ A) 0.10 kJ B) 0.29 kJ C) 0.36 kJ D) 0.46 kJ E) 0.39 kJ

Use the figure to the right for the next problem. An object of mass m = 200 g slides down a frictionless ramp from a height H = 60 cm. Near the bottom of the ramp, the path changes into an arc of a circle with radius r = 20 cm. The arc has coefficient of kinetic friction $\mu$S1U1B1kS1U1B0 = 0.4. The angle $\theta$ = 120S1U1P1$\circ$S1S1P0 and points PS1U1B11S1U1B0 and PS1U1B12S1U1B0 which are the ends of the arc, are at the same height. -A 5-kg box is pushed 5 m up a plane that is inclined at 30º with the horizontal. The coefficient of kinetic friction between the box and the plane is 0.20. The change in potential energy of the box is approximately

A) 12.5 J B) 34.2 J C) 123 J D) 345 J E) 403 J A) 12.5 J B) 34.2 J C) 123 J D) 345 J E) 403 J

Use the figure to the right for the next problem. An object of mass m = 200 g slides down a frictionless ramp from a height H = 60 cm. Near the bottom of the ramp, the path changes into an arc of a circle with radius r = 20 cm. The arc has coefficient of kinetic friction $\mu$S1U1B1kS1U1B0 = 0.4. The angle $\theta$ = 120S1U1P1$\circ$S1S1P0 and points PS1U1B11S1U1B0 and PS1U1B12S1U1B0 which are the ends of the arc, are at the same height. -The work done by a conservative force between two points is

A) always positive. B) always dependent upon the time. C) always independent of the path. D) zero. E) never completely recoverable. A) always positive. B) always dependent upon the time. C) always independent of the path. D) zero. E) never completely recoverable.

Exam 7: Conservation of Energy

$Consider a motion in which a particle goes from A \to B along path 1 and from B back to A along path 2, as shown. W(AB, 1) = work in going from A \to B along path 1. W(BA, 2) = work in going from B \to A along path 2. If only conservative forces are acting, then$ Consider a motion in which a particle goes from A $\to$ B along path 1 and from B back to A along path 2, as shown. W(AB, 1) = work in going from A $\to$ B along path 1. W(BA, 2) = work in going from B $\to$ A along path 2. If only conservative forces are acting, then

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Question 61

The binding energy of a deuteron is 2.22 MeV. This means that

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Question 62

A simple pendulum has a bob of mass M. The bob is on a light string of length . The string is fixed at C. At position A, the string is horizontal and the bob is at rest. The bob is released from A and swings to B, where the string is vertical. The tension in the string when the bob first reaches B is

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Question 63

A system comprising two blocks is shown, one of which is on an inclined plane. The pulley is of negligible mass and is frictionless. The system starts from rest at position 1 and accelerates. Measurements taken when the blocks reach position 2 indicate that (1)the kinetic energy of block A has changed by 330 J; (2)the potential energy of block A has changed by 588 J; (3)the kinetic energy of block B has changed by 110 J; and (4)the potential energy of block B has changed by 98 J. The amount of mechanical energy that has been converted to heat because of friction is

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Question 64

By what fraction does your mass increase when you and your car travel down the highway at 70 mph? Assume that the total mass of your car and occupant is 2000 kg.

(Multiple Choice)

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Question 65

A 10-kg box is pushed up a plane inclined at 37º with the horizontal. The box starts from rest and is pushed 5 m along the incline with a uniform acceleration of 2 m/s². The coefficient of kinetic friction is 0.20 and the pushing force is parallel to the plane. The increase in the potential energy of the box is

(Multiple Choice)

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Question 66

A 5200-kg cable car in Hong Kong is pulled a distance of 360 m up a hill inclined at 12º from the horizontal. The change in the potential energy of the car is

(Multiple Choice)

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Question 67

Use the figure to the right for the next problem. An object of mass m = 200 g slides down a frictionless ramp from a height H = 60 cm. Near the bottom of the ramp, the path changes into an arc of a circle with radius r = 20 cm. The arc has coefficient of kinetic friction $\mu$ _k = 0.4. The angle $\theta$ = 120^$\circ$ and points P₁ and P₂ which are the ends of the arc, are at the same height. $Use the figure to the right for the next problem. An object of mass m = 200 g slides down a frictionless ramp from a height H = 60 cm. Near the bottom of the ramp, the path changes into an arc of a circle with radius r = 20 cm. The arc has coefficient of kinetic friction \mu k = 0.4. The angle \theta = 120 \circ and points P1 and P2 which are the ends of the arc, are at the same height. -A 5-kg box is pushed 5 m up a plane that is inclined at 30º with the horizontal. The coefficient of kinetic friction between the box and the plane is 0.20. The change in potential energy of the box is approximately$ -A 5-kg box is pushed 5 m up a plane that is inclined at 30º with the horizontal. The coefficient of kinetic friction between the box and the plane is 0.20. The change in potential energy of the box is approximately

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Question 68

The graph shows a plot of the gravitational potential energy U of a 1-kg body as a function of its height h above the surface of a planet. The acceleration due to gravity at the surface of the planet is

(Multiple Choice)

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Question 69

A projectile of mass m is propelled from ground level with kinetic energy of 450 J. At the exact top of its trajectory, its kinetic energy is 250 J. To what height above the starting point does the projectile rise?

(Multiple Choice)

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Question 70

A block with a mass M = 4.85 kg is resting on a slide that has a curved surface. There is no friction. The speed of the block after it has slid along the slide sufficiently far for its vertical drop to be 19.6 m is

(Multiple Choice)

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Question 71

Use the figure to the right for the next problem. An object of mass m = 200 g slides down a frictionless ramp from a height H = 60 cm. Near the bottom of the ramp, the path changes into an arc of a circle with radius r = 20 cm. The arc has coefficient of kinetic friction $\mu$ _k = 0.4. The angle $\theta$ = 120^$\circ$ and points P₁ and P₂ which are the ends of the arc, are at the same height. $Use the figure to the right for the next problem. An object of mass m = 200 g slides down a frictionless ramp from a height H = 60 cm. Near the bottom of the ramp, the path changes into an arc of a circle with radius r = 20 cm. The arc has coefficient of kinetic friction \mu k = 0.4. The angle \theta = 120 \circ and points P1 and P2 which are the ends of the arc, are at the same height. -The work done by a conservative force between two points is$ -The work done by a conservative force between two points is

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Question 72

A roller coaster starts from rest at point A. If you ignore friction and take the zero of potential energy to be at C,

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Question 73

Showing 61 - 73 of 73

The binding energy of a deuteron is 2.22 MeV. This means that

By what fraction does your mass increase when you and your car travel down the highway at 70 mph? Assume that the total mass of your car and occupant is 2000 kg.

A 5200-kg cable car in Hong Kong is pulled a distance of 360 m up a hill inclined at 12º from the horizontal. The change in the potential energy of the car is

The graph shows a plot of the gravitational potential energy U of a 1-kg body as a function of its height h above the surface of a planet. The acceleration due to gravity at the surface of the planet is

A projectile of mass m is propelled from ground level with kinetic energy of 450 J. At the exact top of its trajectory, its kinetic energy is 250 J. To what height above the starting point does the projectile rise?

A block with a mass M = 4.85 kg is resting on a slide that has a curved surface. There is no friction. The speed of the block after it has slid along the slide sufficiently far for its vertical drop to be 19.6 m is

A roller coaster starts from rest at point A. If you ignore friction and take the zero of potential energy to be at C,

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Newtons Laws

Applications of Newtons Laws

Work and Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

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Exam 7: Conservation of Energy

Consider a motion in which a particle goes from A →\to→ B along path 1 and from B back to A along path 2, as shown. W(AB, 1) = work in going from A →\to→ B along path 1. W(BA, 2) = work in going from B →\to→ A along path 2. If only conservative forces are acting, then

The binding energy of a deuteron is 2.22 MeV. This means that

By what fraction does your mass increase when you and your car travel down the highway at 70 mph? Assume that the total mass of your car and occupant is 2000 kg.

A 5200-kg cable car in Hong Kong is pulled a distance of 360 m up a hill inclined at 12º from the horizontal. The change in the potential energy of the car is

The graph shows a plot of the gravitational potential energy U of a 1-kg body as a function of its height h above the surface of a planet. The acceleration due to gravity at the surface of the planet is

A projectile of mass m is propelled from ground level with kinetic energy of 450 J. At the exact top of its trajectory, its kinetic energy is 250 J. To what height above the starting point does the projectile rise?

A block with a mass M = 4.85 kg is resting on a slide that has a curved surface. There is no friction. The speed of the block after it has slid along the slide sufficiently far for its vertical drop to be 19.6 m is

A roller coaster starts from rest at point A. If you ignore friction and take the zero of potential energy to be at C,

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Newtons Laws

Applications of Newtons Laws

Work and Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

Thermal Properties and Processes

Filters