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प्रश्न
Define velocity. State its unit.
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उत्तर
The velocity of a body is the distance travelled per second by the body in a specified direction.
Its SI unit is metre/second (m/s).
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संबंधित प्रश्न
Name the physical quantity whose SI unit is :
(a) m/s (b) m/s2
Fill in the following blank with suitable word :
If a body moves with uniform velocity, its acceleration is ..............
When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then retardation will be :
Differentiate between uniform acceleration and variable acceleration.
Give one example of following motion :
Variable acceleration
A car starting from rest acquires a velocity 180m s-1 in 0.05 h. Find the acceleration.
A bicycle initially moving with a velocity 5.0 m s-1 accelerates for 5 s at a rate of 2 m s-2. What will be its final velocity?
For a uniformly retarded motion, the velocity-time graph is _____________
A body, initially at rest, starts moving with a constant acceleration 2 m s-2. Calculate: (i) the velocity acquired and (ii) the distance travelled in 5 s.
The velocity-time graph (Fig. 8.5) shows the motion of a cyclist. Find (i) its acceleration (ii) its velocity and (iii) the distance covered by the cyclist in 15 seconds.
