SCIENCE 8

What happens to the kinetic energy of an object if its speed is doubled?

• twice as much

• thrice as much

• increases four times

• decreases four times

The following applies the concept of potential energy EXCEPT:

• water in a dam

• a person playing the guitar

• a rock sitting at the edge of a cliff

• tree branches high up in a tree

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

object?

• mass

• speed

• height or location

• strength of gravity

Which of the following statements is TRUE about potential energy?

• A

  It is dependent on the speed of an object.

• It does not depend on the strength of gravity.

• 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 point has the greatest potential energy

• Point A

• Point B

• Point C

• Point A & C

Which point has increasing kinetic energy?

• Point C

• Point B

• Point A

• Point A & C

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 quantities has the greatest influence on the amount of kinetic energy of a car while travelling on a highway?

• mass

• size

• speed

• weight

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

• PE is greater than KE

• PE is equal to KE

• PE is lesser than KE

• KE is greater than PE

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

• gains PE and loses KE

• loses both PE and KE

• gains both PE and KE