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प्रश्न
If a body is moving with a constant velocity its acceleration is ______.
विकल्प
stationary
zero
changing
constant
displacement
velocity
speed
acceleration
stationary but not zero
increases
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उत्तर
If a body is moving with a constant velocity its acceleration is zero.
संबंधित प्रश्न
A train starts from rest and accelerates uniformly at a rate of 2 m s−2 for 10 s. It then maintains a constant speed for 200 s. The brakes are then applied and the train is uniformly retarded and comes to rest in 50 s. Find
- The maximum velocity reached,
- The retardation in the last 50 s,
- The total distance travelled,
- The average velocity of the train.
A motor bike running at 90 kmh−1 is slowed down to 18 kmh−1 in 2.5 s. Calculate
- acceleration
- distance covered during slow down.
What is the SI unit of acceleration?
Write the SI unit of retardation.
Is it possible for an accelerating body to have constant speed?
Convert the following acceleration:
1/36 m/s2 into km/h2
A car accelerates to a velocity of 30 m/s in 10 s and then decelerates for 20 s so that it stops. Draw a velocity-time graph to represent the motion and find:
Distance travelled
State whether true or false. If false, correct the statement.
Acceleration can get negative value also.
The speed of a particle is constant. Will it have acceleration? Justify with an example.
A car is being driven at a speed of 20ms-1 when brakes are applied to bring it to rest in 5 s. The deceleration produced in this case will be ______.
