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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
State the effects of a force applied on a non-rigid and a rigid body. How does the effect of the force differ in the two cases?
Give one example in the given cases:-
A force changes the shape of a body
Complete the following
1 N = ..........dyne.
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.
A uniform car of mass 500g travels with a uniform velocity of 25 ms-1 for 5 s. The brakes are then applied and the car is uniformly retarded and comes to rest in further 10 s calculate
1) the retardation
2) the distance which the car travels after the brakes are applied
3) The force exerted by the brakes.
A truck of mass `5 xx 10^3` kg starting from rest travels a distance of 0.5 km in 10 s when a force is applied on its calculate:
1) the acceleration acquired by the truck and
2) the force applied
A force od 10 kgf is applied on a body of mass 100 g initially at rest for 0.1 s calculate:
a) the momentum acquired by the body
b) the distance travelled by the body in 0.1s. Take g = 10 N kg-1
______ has to be applied to change the ______ of a ______ object.
(moving, direction, force)
A ball was set rolling on a large table. If its ______ is to be changed, a ______ will have to be applied on it.
Which of the following statement is not correct for an object moving along a straight path in an accelerated motion?
