What is the acceleration of a particle moving with uniform velocity?
1ms-2
2ms-2
0
∞
Which of the following is a vector quantity.
force
velocity
momentum
all the above
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
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 particle is pushed always on a horizontal surface in such a way that it starts with a velocity of 12 m/s and decreases at the rate of 0.5 m/s2. The time it will take to come to rest is
42s
48s
24s
84s
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
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
The velocity of a car at 10.50 am is 60km/h and at 10.52am it is 80km/h. Assuming constant acceleration in the given period its value is
600km/h2
500km/h2
400km/h2
300km/h2
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