Energy

An object from a certain height falls freely. Which of the following happens to PE and KE when the object is half on its way down?

• loses PE and gains KE

• loses both PE and KE

• gains PE and loses KE

• A. gains both PE and KE

Which of the following quantities has the greatest influence on the amount of kinetic energy of a car while traveling on a highway?

• weight

• size

• speed

• mass

How do you compare the PE of the moving object at the highest point compared to its KE?

• PE is lesser than KE

• PE is greater than KE

• PE is equal to KE

• KE is greater than PE

Which of the following pair of quantities are the factors that affect kinetic energy?

• force and distance

• mass and height

• mass and speed

• time and height

Which of the following statements is TRUE about potential energy?

• It does not depend on the mass of the object.

• It is dependent on the speed of an object.

• It does not depend on the strength of gravity.

• It is affected by the mass and location of an object with respect to the ground.

Which of the following does not affect the amount of potential energy of an object?

• speed

• mass

• height or location

• strength of gravity

The following applies the concept of potential energy EXCEPT:

• twice as much

• thrice as much

• increases four times

• decreases four times

The product of force and displacement is

Unit of energy in SI system

The ability to do work is