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प्रश्न
From the diagram given below, calculate acceleration.
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उत्तर
Acceleration = Slope of v.t. graph from O to A
= `"AC"/"OC"=15/10` = 1.5 m/s2
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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.
Draw velocity – time graph for the following situation:
When a body is moving with variable velocity and variable acceleration.
A racing car is moving with a velocity of 50 m/s. On
applying brakes, it is uniformly retarded and comes to rest in 20 seconds. Calculate its acceleration.
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- retardation
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A body has an acceleration of -3.5 ms-2. What is its retardation?
The graph shows how the velocity of a scooter varies with time in 50 s.
Work out: Acceleration.
It is possible to have objects moving with uniform speed but variable acceleration.
Assertion: When a body is subjected to a uniform acceleration, it is always moving in a straight line.
Reason: Motion may be straight-line motion or circular motion.
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When a body is said to be in
- uniform acceleration
- non–uniform acceleration?
