Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true. 9. No work can be done when the force of an object is perpendicular to the displacement of an object  10. As the velocity of an object halves , the kinetic energy halves.

Q: 3. See the figure below. If a 3 kg mass is moved up the first frictionless incline and the same 3 kg…

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Q: 1. How much work is done by a person pushing a box with a constant force of 300 N: a. if it is too…

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Q: 85. What is work – energy theorem? a. It states that whenever work is done, energy changes. b. It…

A: The amount of work done by all the forces on a particle is equal to the change in kinetic energy.

Q: 500 joules of work was done in 10 seconds, the power used was A. 0.025 watts B. 0.025 N C. 40 N D.…

A: Given value--- work = 500 J. time = 10 sec. We need to find--- Power ?

Q: QUESTION 3 What happens when a net force performs positive work on an object? O a. The object…

A: Work-energy theorem gives us a relation in b/w work & K.E. This theorem states that when at…

Q: A person pushes the wall with a force of 53N . How much work the person is doing on the wall.   A.…

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Q: A ball is thrown straight up from the ground. The work done on it by the force of gravity is

A: Suppose a body of mass "m" & it is thrown vertically upward.

Q: DIRECTION: Classify the following as a to potential energy or kinetic energy. Write K for kinetic…

A: The energy due to position is the potential energy on the object. The energy due to motion is known…

Q: 1. If you pushed a 20 kg box across the floor for a distance of 60 m with a force of 15 N how much…

A: #1 Given data: The mass of box is m=20 kg. The distance traveled by the box is d=60 m. The force…

Q: A 1400-N crate rests on the floor. a.) How much work is required to move it at constant speed 5.0 m…

A: Given Weight of the crate is Fg=1400 N Displacement of the crate is d=5.0 m Frictional force is…

Q: What is the difference between when work is done by a system and when work is done on a system? a.…

A: Introduction :- Here we need to think about the concept of energy (internal energy) which depends…

Q: 4. In a tug-of-war match, your team is slowly pulling the rope (and the other team) to your side. a.…

A: a. As your team applies a force and there is displacement ( as the other team moves toward your…

Q: A block is moving with 52.0 J of KE. A 12.0 N force pulls the block straight back, against the…

A: Given data: Initial Kinetic Energy (KEi) = 52.0 J Force (F) = 12.0 N, straight backward Displacement…

Q: 5. How much work is done (how much energy is required) to accelerate a 1987.5 kg car entering the…

A: Given: The mass of the car is 1987.5 kg. The initial speed of the car is 18.271125 m/s. The final…

Q: Two cars have the same mass, but one is moving three times as fast as the other is. How much more…

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Q: A 5.00 gram bullet moving horizontally with a speed of 400 m/s collides with a wooden block. After…

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Q: 1. Describe the energy transformations that occur when you climb to the top of a stairway.

A: To discuss the energy transformations that occur when climb to the top of a stairway.

Q: Describe a situation where an object is in motion but no physical work is being accomplished.…

A: Consider the situation where a person carrying a suitcase on his head and walking. Now for an…

Q: 3.The Work-Energy Principle states that work is equal to the change in kinetic energy. What unit…

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Q: Two people of the same mass climb the same set of stairs. Person A climbs the stairs in 25 s. Person…

A: Let mass of each person = m Weight of each person = mg Time taken by A to climb the set of stairs =…

Q: Identify each situation as: WORK IS DONE or WORK IS NOT DONE           a.A teacher applies force to…

A: Whether the work is done on the object or not depends on the force applied and displacement of the…

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.