Advertisements
Advertisements
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?
उत्तर
Do it yourself.
APPEARS IN
संबंधित प्रश्न
Give one example in the given cases:-
A force changes the shape of a body
The adjacent diagram shows a heavy roller, with its axle at O, which is to be raised on a pavement XY. If there is friction between the roller and pavement, show by an arrow on the diagram the point of application and the direction of force to be applied. If pivoted at O, now will it go up?
Give two examples each of contact and non-contact forces.
Define an Inclined plane.
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?
How do you define force? What are the forces acting on a man standing in a lift? If the lift moves down with an acceleration of 2 ms−2, what is the net force on the man if his mass is 50 kg?
A ball was set rolling on a large table. If its ______ is to be changed, a ______ will have to be applied on it.
Force acting on a given area is called pressure.
Give two examples to verify that a force tends to change the static condition of a body.
Define force. Mention its SI unit.
