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प्रश्न
Draw velocity – time graph for the following situation:
When a body is moving with variable velocity, but uniform retardation.
उत्तर
Following is the velocity-time graph:
When a body is moving with variable velocity, but uniform retardation
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संबंधित प्रश्न
Give one example of the following motion:
Uniform retardation
A car travels with uniform velocity of 25 m s-1 for 5 s. The brakes are then applied and the car is uniformly retarded and comes to rest in further 10 s. Find:
- The distance which the car travels before the brakes are applied,
- Retardation and
- The distance travelled by car after applying the brakes.
Diagram is given below shows velocity – time graph of car P and Q, starting from the same place and in the same direction. Calculate the Acceleration of car P.
A truck running at 90 kmh−1, is brought to rest over a distance of 25 m. Calculate the retardation and time for which brakes are applied.
Write the SI unit of retardation.
The graph shows how the velocity of a scooter varies with time in 50 s.
Work out: Deceleration
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:
The Deceleration.
If a body starts from rest, what can be said about the acceleration of the body?
Assertion: Position-time graph of a stationary object is a straight line parallel to the time axis.
Reason: For a stationary object, the position does not change with time.
When a body is said to be in
- uniform acceleration
- non–uniform acceleration?
