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प्रश्न
Moon or Cloud?
Observe the moon on a windy night with a fair bit of cloud cover in the sky. As the cloud passes in front of the moon you sometimes think it is the moon which is moving behind the cloud. What would you think if you were to observe a tree at the same time?
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उत्तर
Do it yourself.
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संबंधित प्रश्न
Complete the following sentence:
Mass X change in velocity = ............x time interval.
A body of mass 1.5 kg is dropped from a height of 12 m. What is the force acting on it during its fall? (g = 9.8 ms−2)
Two balls of masses in ratio 1 : 2 are dropped from the same height find
a) the ratio between their velocities when they strike the ground and
b) the ration if the forces acting on them during motion.
How much acceleration will be produced in a body of mass 10 kg acted upon by a force of 2 kgf?(g = 9.8 ms-2)
Two bodies have masses in the ratio 3 : 4 when a force is applied on the first body. it moves with an acceleration of 6 ms-2 . How much acceleration will the same force produce in the other body?
A cricket ball of mass 100 g strikes the hand of a player with a velocity of 20 ms-1 and is brought to rest in 0.01 s calculate
1) the force applied by the hand of the player.
2) the acceleration of the ball
A man can open a nut by applying a force of 150 N by using a lever handle of length 0.4 m. What should be the length of the handle if he is able to open it by applying a force of 60 N?
______ has to be applied to change the ______ of a ______ object.
(moving, direction, force)
To produce a displacement ______ is required.
Assertion: Force is defined as a push or pulls acting on a body.
Reason: CGS unit of force is the newton.
