1. How will you decrease the kinetic energy of an object moving at a constant speed of 20m/s?
a. decrease it's mass
b. increase its mass
c. decrease its speed
D increase its speed

2. What will happen to the kinetic energy of a moving object if it's speed is doubled?
a. halved
b. stayed the same
c. doubled
d. quadrupled

3. Which has the greatest kinetic energy in the following situations?
a. a 60kg car at rest
b. a 60kg man moving 3m/s
c. a 60kg horse moving 6m/s
d. a 60kg carabao moving 9m/s

4. What are the factors that affect kinetic energy?
I. time
II. mass
III. speed
IV. power

a. I and II
b. II and III
c. III and IV
d. I and IV

5. (please check the picture):>

—kindly answer this please​