Physics
A boy goes from his house to school by bus at a speed of 20 km h-1 and returns back through the same route at a speed of 30 km h-1. The average speed of his journey is:
- 24 km h-1
- 25 km h-1
- 30 km h-1
- 20 km h-1
Related Questions
A ball falls down vertically. Its motion is:
- periodic
- linear
- circular
- vibratory
If a body covers equal distances in equal intervals of time, the motion is said to be:
- uniform
- non-uniform
- oscillatory
- rotatory
The earth attracts a body of mass 1 kg with a force of 10 N. The mass of a boy is 50 kg. His weight will be:
- 50 kg
- 500 N
- 50 N
- 5 N
Explain the meaning of the terms rest and motion.