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प्रश्न
A body falls towards the earth. Does it have positive or negative acceleration?
उत्तर
If a body falls towards earth then it would have a positive acceleration.
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संबंधित प्रश्न
Distinguish between acceleration and retardation.
The unit of retardation is ____________
A space craft flying in a straight course with velocity of 75 km s-1 fires its rocket motors for 6.0 s. At the end of this time its speed is 120 km s-1 in the same direction.
Find
(i) The space craft's average acceleration while the motors were firing
(ii) The distance travelled by the space craft in the first 10 s after the rocket motors were started, the motors being in action for only 6 s.
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- retardation
- distance covered during the application of brakes.
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