Which one of the following is a scalar quantity ?
Velocity
Acceleration
Speed
Retardation
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
If a body is starting from rest and travels with uniform acceleration 5ms-2, what is its velocity after 5s?
25 ms-1
10 ms-1
25 ms-2
10 ms-2
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 particle is travelling with a constant speed, This means that
its position remains constant as time passes
it covers equal distances in equal time intervals
its acceleration is zero
it does not change its direction of motion
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
Acceleration of an object is equal to
speed / time
velocity / time
change in velocity / time
change in speed/ time
A car starts from rest and moves with uniform acceleration of 0.6m /sec2 for 5 minutes. Calculate the velocity required by the car.
3 m/s
3 m/s2
180m/s
180 m/s2
A bus travels a distance with a speed of 50km/ hr and returns with a speed of 40 km/hr. Find the average speed of the whole journey.
44.4m/s
44.4km/hr
45km/hr
45m/s
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
