Page 3 - Class IX-PHYSICS-CH-8- FORCE AND LAWS OF MOTION

a)What is the force with each person pushes the car (assume that everyone pushing the car
is exerting same muscular force.)
b) Explain why it is difficult for a fireman to hold a hose which ejects large amount of water
with high velocity. (4M)
2. During the school trip, the bus was covering some distance in a given time, which is
recorded by Ram as far the assignment day given by his teacher. The following is the
distance timetable of the bus when in motion.
TIME DISTANCE
0 0
1 1
2 8
3 27
4 64
5 125
6 216
7 343
The teacher asked him the following
a) can you come to any conclusion concerning the acceleration? Is it zero increasing
decreasing or constant?
b) What conclusions can you give about bus’s force? (4M)