Acceleration of an object is equal to
speed / time
velocity / time
change in velocity / time
change in speed/ time
When a body starts from rest, its _________ is zero.
initial velocity
initial distance
final velocity
final distance
A car takes 20 seconds to stop after the brakes are applied. Find its initial velocity if the retardation due to brakes is 1.5ms-2.
30ms-1
-30ms-1
300ms-1
-300ms-1
A body starting from rest travels a distance of 10m in 2 seconds. What is its acceleration?
5ms-2
5ms-1
5ms2
5m-2s
When a body undergoes changes in equal velocity in equal intervals of time, then the body is said to be in _________.
Uniform acceleration
Positive acceleration
Uniform speed
Positive speed
A particle is pushed along a horizontal surface in such a way that it starts with a velocity of 12m/s and decreases at the rate of 0.5 m/s2. The time it will take to come to rest is:
42s
24s
48s
84s
Distance is _______.
Always positive
Always negative
Cannot say
May be positive or negative
The unit of velocity is
m2s
ms-1
ms-2
sm-1
A particle moving with an initial velocity of 5 m/s is subjected to a uniform acceleration of -2.5m/s-2. The displacement in the next 4 seconds is
40m
0
20m
60m
A body starting from rest travels a distance of 14m in 4th second. Calculate its acceleration.
1.75ms-2
4ms-2
1.75m-1
4ms-1
