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: 10. What is the work from 6m to 8m in the diagram below? а. 2J b. 4J C. 6J d. 8J Posten m) (N

A: According to question we need to find work done from 6m to 8m.

Q: Which of the following statements are TRUE? A. Power is a scalar physical quantity. B. Power can be…

A: A - True ( since P=W/t & work is scalar)  B - True (since work can be positive, negative &…

Q: The quantity F•v is ______? a.kinetic energy b.potential energy c.power d.work done

A:

Q: The coefficient of kinetic friction between a suitcase and the floor is 0.272. If the suitcase has a…

A:

Q: 84. When is work done on an object? a. when a net force acts on an object b. when the object moves…

A: The work done on an object is W=Fnetd≠0  if Fnet≠0

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

A:

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…

A:

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: 2. An 8.0kg box slides down a surface that is inclined at 53° below the horizontal at a distance of…

A: (A) The work done due to friction is, Wfriction= Ffriction.d Here, " Wfriction is the work done due…

Q: When the force is opposite the displacement of the object where it is acting, the force is doing  A.…

A: Solution-: Since force is opposite the displacement of object then angle between force and…

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.…

A:

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: solve the following. Provide 1. Given 2. Required 3. Equation 4. Solution 5. Answer

A: Solution:

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: Q05. If an object goes to the left, but one of the forces pushes it to the right, opposing its…

A:

Q: 32. A ______________ force is a force that does zero work on a closed path.   a. Non-conservative b.…

A: Work done by conservative force is independent of path and depends only on end points so its 0 in…

Q: An object in a horizontal surface was moved by applying a constant force (in Newtons), F = 8î + 5ĵ.…

A: The force applied to the object is Object displaced distance to the right is d = 9 m

Q: The total energy required to move a 10-N block up a 25-degree incline for 10 meters is 500 Joule. A…

A:

Q: 12. When you go upstairs, you a. do more work when you walk than when you run b. do less work when…

A: 12.) Work depends on force and displacement only as force acting during running or walking is weight…

Q: 64. Which of the following statements is/are true about the value of work done?   a. The work done…

A:

Q: 5. If the sign for work is negative, * O a. Kinetic energy is increasing. O b. Kinetic energy is…

A: work energy theorem. Work done is equal to change in Kinetic energy. W = K.E 2- K.E 1 K.E. 2 -…

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: Which of the following statements is/are true about the value of work done? a. The work done by a…

A: The work done due to a force is given by  W = Fd.cos(θ) Here F = Force d = displacement θ = angle…

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: Which of the following statements are FALSE? A. Power is a scalar physical quantity. B. Power can be…

A: Rate of doing work is known as power . So power (P) = W/t

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

A:

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

A:

Q: 10. A machine is used to move a 700 N object by 2.00 m by exerting 400 N of force through a distance…

A:

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…

A:

Q: Q1. A force of 7N as on an object. The displacement is, say 8 m, in the direction of the force. Let…

A:

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: . Which of the following statements represent example of situation showing work? a. A child applies…

A: Work is said to be done when an object is displaced on applying external force . So ,for work…

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.