Advertisements
Advertisements
Question
State how the velocity-time graph can be used to find
The acceleration of a body
Advertisements
Solution
The slope of the velocity-time graph gives the value of acceleration.
APPEARS IN
RELATED QUESTIONS
Explain why, the motion of a body which is moving with constant speed in a circular path is said to be accelerated.
A bus was moving with a speed of 54 km/h. On applying brakes it stopped in 8 seconds. Calculate the acceleration.
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 ?
A boy is sitting on a merry-go-round which is moving with a constant speed of 10 m s−1. This means that the boy is :
Give one example of following motion :
Variable acceleration
If a stone and a pencil are dropped simultaneously in vacuum from the top of a tower, then which of the two will reach the ground first? Give reason.
A car starting from rest acquires a velocity 180m s-1 in 0.05 h. Find the acceleration.
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.
Multiple choice Question. Select the correct option.
A body dropped from the top of a tower reaches the ground in 4s. Height of the tower is
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.

