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प्रश्न
State whether true or false. If false, correct the statement.
Acceleration can get negative value also.
विकल्प
True
false
उत्तर
Acceleration can get negative value also- True
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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
(i) The maximum velocity reached,
(ii) The retardation in the last 50 s,
(iii) The total distance travelled,
(iv) The average velocity of the train.
A motorbike, initially at rest, picks up a velocity of 72 kmh−1 over a distance of 40 m. Calculate
- acceleration
- time in which it picks up above velocity.
What does a positive acceleration mean?
Distinguish between uniformly and non-uniformly accelerated motions.
Interpret the following graph:
A car starts from rest and it is travelling with a velocity of 20 m/s in 10 s. What is its acceleration?
The speed of a particle is constant. Will it have acceleration? Justify with an example.
A quantity has a value of 16ms-2. It is the ______.
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 ______.
Assertion: A negative acceleration of a body can be associated with speeding up of the body.
Reason: Increase in the speed of a moving body is independent of its direction of motion.
