Advertisements
Advertisements
Question
A body falls towards the earth. Does it have positive or negative acceleration?
Advertisements
Solution
If a body falls towards earth then it would have a positive acceleration.
APPEARS IN
RELATED QUESTIONS
A body is moving vertically upwards. Its velocity changes at a constant rate from 50 m s−1 to 20 m s−1 in 3 s. What is its acceleration?
A toy car initially moving with uniform velocity of 18 km h-1 comes to a stop in 2 s. Find the retardation of the car in S.I. units.
Figure shows the velocity-time graphs for two cars A and B moving in the same direction. Which car has greater acceleration? Give reasons to your answer.

A cyclist driving at 36 kmh−1 stops his motion in 2 s, by the application of brakes. Calculate
- retardation
- distance covered during the application of brakes.
Define acceleration.
The acceleration of a moving body is constant in magnitude and direction. Must the path of the body be a straight line?
If not, given an example.
The graph shows how the velocity of a scooter varies with time in 50 s.
Work out: Deceleration
Figure represents graphically the velocity of a car moving along a straight road over a period of 100 hours.
Calculate the acceleration along AB and the retardation along BC.
The slope of a velocity-time graph gives ______.
If a moving body comes to rest, then its acceleration is ______.
