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प्रश्न
State its value in C.G.S. as well as in S.I. system.
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उत्तर
In S.I. system, g = 9.8 ms−2; In C.GS. system, g = 980 cms−2
संबंधित प्रश्न
What is meant by the term retardation? Name its S.I. unit.
Give one example of the following motion:
Uniform retardation
A vehicle is accelerating on a straight road. Its velocity at any instant is 30 km/h. After 2 s, it is 33.6 km/h, and after further 2 s, it is 37.2 km/h. Find the acceleration of the vehicle in m s-2. Is the acceleration uniform?
A ball is rolling from A to D on a flat and smooth surface. Its speed is 2 cm/s. On reaching B, it was pushed continuously up to C. On reaching D from C, its speed had become 4 cm/s. It took 2 seconds for it to go from B to C. What is the acceleration of the ball as it goes from B to C?
When is the acceleration due to gravity positive?
Give an example of an accelerated body, moving with a uniform speed.
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.
From the diagram given below, calculate acceleration.
A racing car, initially at rest, picks up a velocity of 180 kmh−1 in 4.5 s. Calculate
- acceleration
- distance covered by the car.
Distinguish between uniformly and non-uniformly accelerated motions.
