Which of the following situations shows work done on an object?
a. Lifting a box from the ground.
b. Holding a pen while standing still.
c. Pushing a crate that does not move.
d. Pulling a rope attached to a fixed wall.
3.Which of the following quantities does kinetic energy depend on?
a. mass b. weight c. gravity d. position
4. What is the SI unit which is used to describe the kinetic energy of a moving body?
a. Joule (J) b. meter (m) c. second (s) d. Newton (N)
5. Which of the following is the SI unit of measurement for gravitational potential energy?
a. watt b. joule c. ampere d. newton
6. Where does a car on an incline have the most gravitational potential energy?
a. top of the incline
b. bottom of the incline
c. halfway down the incline
d. it has the same potential energy at all points
7. What is the SI unit for work done on an object by a force?
a. Joule (J) c. Newton (N)
b. seconds (s) d. kilogram (kg)
8. What is the SI unit for the kinetic energy of an object in motion?
a. Joule (J) c. Newton (N)
b. seconds (s) d. kilogram (kg)
9. Which of the following quantities are described by the power used by an object?
a. work and time
b. energy and inertia
c. energy and position
d. work and acceleration due to gravity
10. How would you describe the power used by an object if the amount of work done by it increases?
a. Its power increases also.
b. Its power decreases.
c. Its power is constant.
d. Its power is zero.
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Where does a car on an incline have the most gravitational potential energy?
Answer: A. Top of the Incline
What is the SI unit for work done on an object by a force?
Answer: A. Joule (J)