Question

Ram and Ramesh are travelling in a car. Ram is visiting his uncle’s house with Ramesh which
is located at a distance of 20 km from his house. The car is moving through huge traffic and
speed of car is 20 km/hr. After travelling some distance, the traffic became less and the car
accelerated and speed changed to 40 km/hr. The car moved with this velocity constantly for 15
secs. Suddenly, a tyre of the car busted and the car came to a rest. Ram and Ramesh had to hire
another car to reach the place.
Based on the above information answer any FOUR of the following questions.
(a) What do you mean by term average speed of an object?
(b) )” Average speed is never zero, but average velocity can be zero”- Justify this
statement.
(c) What is acceleration and what is its S.I. unit?
(d) What is the acceleration of an object in uniform motion?
(e) Give two examples of non-uniform motion from our day to day life.

Answer 1

Answer:

(b) )” Average speed is never zero, but average velocity can be zero”- Justify this

statement.