Question

a. Mention any three points of difference between distance and displacement
b. i) Define kinetic energy.
ii) Define S.I unit of volume.
iii) The density of brass is 8.4 g cm⁻³. What do you mean by this statement?
c. (i) A boy travels with an average speed of 20 m s⁻¹ for 1200 S. How much distance does he
travel?
(ii) A boy walks a distance 30 m in 30 second and another 30 m in 90 second. Describe the
type of motion of the boy and find his average speed in m s⁻¹

Answer 1

Answer:

1) Kinetic energy is a form of energy that an object or a particle          has by reason of its motion.

2) cubic meter

3) it means that 1cm³ of brass has a mass of 8.4g.

4) 12 km

5) 0.4ms  −1