Which one of the following is a scalar quantity ?
Velocity
Acceleration
Speed
Retardation
A body starting from rest is travelling with an acceleration of 6 m/s2. Calculate the distance travelled by it in the 5th second.
75m
27m
30m
75m/s
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
Distance is _______.
Always positive
Always negative
Cannot say
May be positive or negative
A car moving a speed of 54km/ h an applying brakes stopped in 8 seconds. Calculate the acceleration.
15/8 m/s2
120 m/s2
-15/8 m/s2
-120m/s2
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
The driver in a car moving with a speed of 10ms-1 increases the speed at the rate of 10ms-1 for 5 seconds. What is the maximum speed attained by the car.
20ms-1
20ms-2
60 ms-2
60ms-1
The unit of velocity is
m2s
ms-1
ms-2
sm-1
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
