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Illustration depicting objects with different masses falling simultaneously to the ground to demonstrate Galileo's conclusion that acceleration due to gravity is independent of mass.

Galileo designed experiments in which objects with different masses were dropped from the same height. Regardless of the mass, the objects appeared to hit the ground at the same time. What did Galileo conclude from these studies? A. An object falls faster than another object that has lower weight. B. The rate at which an object falls is inversely proportional to its mass. C. Acceleration due to gravity is independent of mass. D. The weight of an object is independent of its mass.

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Illustration showing an object before and after work has been done on it, highlighting the change in energy

Which of the following is the best evidence that work has been done on or by an object? The velocity of the object remains constant. The mass of the object has changed. The energy of the object has changed. The direction the object is moving remains constant.

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Illustration showing an object with increased energy after work has been done on it

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Illustration showing a 2-kg ball moving towards a wall at 4 m/s, coming to a stop and sticking to the wall, representing the energy loss in the collision.

A 2-kg ball with an initial speed of 4 m/s sticks to a wall after colliding with the wall. How much kinetic energy is lost during the collision?

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Digital illustration depicting a robotic arm lifting cafeteria trays with a force of 62 N over a distance of 2 m, showcasing work being done by the arm.

A robotic arm lifts a stack of cafeteria trays weighing 62 newtons (N). It moves the trays 2 meters (m). How much work has the robotic arm performed?

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Image of a rock falling from a height with a caption showing kinetic energy calculation formula.

A 10-kg rock falls from a height of 8.0 m above the ground. What is the kinetic energy of the rock just before it hits the ground?

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Illustration showing two ships traveling at the same speed: one carrying heavy cargo and the other carrying light cargo, with the heavy cargo ship taking longer to come to a stop than the light cargo ship due to inertia.

What causes a ship carrying heavy cargo to take more time to come to a stop than an identical ship carrying lighter cargo if both ships are traveling at the same speed?

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Illustration showing a runner with an arrow indicating momentum and a truck with a larger arrow indicating momentum to depict the concept of momentum difference based on mass and velocity.

What is the difference in momentum between a 50.0 kg runner moving at a speed of 3.00 m/s and a 3000 kg truck moving at a speed of only 1.00 m/s?

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Animated illustration showing two carts colliding inelastically and sticking together, resulting in a final speed of 0.75 m/s.

A 3.00-kg cart with an initial velocity of +4.00 collides inelastically with a 5.00-kg cart with an initial velocity of +2.00 The carts stick together when they collide. What is their speed after colliding? A. 2.00 m/s B. 2.75 m/s C. 3.00 m/s D. 0.75 m/s

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Image of a roller coaster car at the highest point of a steep incline, poised for a thrilling downhill ride

Many roller coasters function by mechanically transporting the cars up a large incline. The cars then roll down and up a series of hills, turns, and spirals until the cars come to rest at the passenger loading station. At which point will the roller coaster have the greatest amount of gravitational potential energy?

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Illustration showing an enlarged Sun and Sirius with exaggerated gravitational force lines between them to depict the concept of increased gravitational pull due to Sirius' tripled mass

What would happen to the gravitational force between the Sun and Sirius, another main sequence star, if the mass of Sirius were to triple?

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Illustration of José conducting an experiment with a ball on a U-shaped ramp showing different energy transformations.

José is investigating the relationship between energy and the motion of an object. José releases a ball onto a U-shaped ramp and observes the motion of the ball as it rolls back and forth between sides 1 and 2 A. The ball loses kinetic energy and gains potential energy when rolling upward. B. The ball loses kinetic energy and loses potential energy when rolling downward. C. The ball gains potential energy and absorbs thermal energy when rolling downward. D. The ball loses potential energy and absorbs thermal energy when rolling upward.

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Illustration depicting the relationship between work and power when running or walking up stairs

Which of the following explains the relationship between work and power when running or walking up a flight of stairs? A. Running requires the same amount of power, but more work than walking. B. Running requires the same amount of work, but more power than walking. C. Running requires more work and more power than walking. D. Running requires less work and less power than walking.

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Illustration showing Peter exerting a force on an object while moving it 40 meters, depicting the concept of work done.

Peter does 3,000 joules (J) of work by moving an object 40 meters (m). What is the force that Peter applies to the object?

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Illustration depicting a student pushing a box across a smooth floor with a force of 113 N for 9.00 s - showcasing the concept of power calculation.

A student pushed a box 27.0 m across a smooth, horizontal floor using a constant force of 113 N. If the force was applied for 9.00 s, how much power was developed, to the nearest watt?

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Illustration of a person running up stairs with a power meter showing the generated power

A 600-newton person runs up a set of stairs that is 2.5 meters high in 2 seconds. How much power has the person generated?

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