Question

4. Answer the following questions in 60-80 words:
(8 marks)
a) A train starts from rest and accelerates uniformly for 30 seconds to acquire a velocity
of 108 km/h. It travels with this velocity for 20 minutes. The driver now applies brakes
and the train slows down uniformly to stop after 20 seconds. Find the total distance
covered by the train.
b) A velocity time graph of a car is plotted below. Observe the graph to answer the
following questions:
8
velocity (m/s)
4
0
2
4
8
10
time (seconds)
(1) Find the acceleration during the first 4 seconds of motion.
(ii) Find the average velocity during the first 4 seconds of motion.
(iii) Find the average speed of the car over the 10 seconds.​

Answer 1

Answer:

mai 7 class me hu to aap thora easy questions dijiye...mera matlab h ki aap 7 class ka questions dijiye...itna hard question mai kaise kru