Advertisements
Advertisements
Question
Can you suggest a real-life example about the motion of a body from the following velocity – time graph?

Advertisements
Solution
A car running on a road at a constant velocity. Then v – t graph will be same as shown by

APPEARS IN
RELATED QUESTIONS
A bus decreases its speed from 80 km h−1 to 60 km h−1 in 5 s. Find the acceleration of the bus.
What term is used to denote the change of velocity with time ?
A car is travelling along the road at 8 ms-1. It accelerates at 1 ms-2 for a distance of 18 m. How fast is it then travelling ?
State how the velocity-time graph can be used to find
The acceleration of a body
The velocity-time graph of a body in motion is a straight line inclined to the time axis. The correct statement is ___________
Derive the following equations for uniformly accelerated motion:
(i) v = u + at
(ii) `"S = ut" + 1/2 "at"^2`
(iii) v2 = u2 + 2aS
where the symbols have their usual meanings.
How can you find the following?
Velocity from acceleration – time graph.
A girl walks along a straight path to drop a letter in the letterbox and comes back to her initial position. Her displacement–time graph is shown in Fig.8.4. Plot a velocity-time graph for the same.

The velocity-time graph (Fig. 8.5) shows the motion of a cyclist. Find (i) its acceleration (ii) its velocity and (iii) the distance covered by the cyclist in 15 seconds.

An object starting from rest travels 20 m in the first 2 s and 160 m in the next 4 s. What will be the velocity after 7 s from the start?
