Advertisements
Advertisements
प्रश्न
Give two examples each of contact and non-contact forces.
Advertisements
उत्तर
Contact Forces:
(i) Pushing a pile of rubble by a bulldozer.
(ii) Squeezing of a gum tube to extract the gum.
Non-contact Forces:
(i) When a magnet is brought near iron-nails, they stick to the magnet.
(ii) A ripen apple falls by itself from the tree.
संबंधित प्रश्न
Give one example in the given cases:
A force stops a moving body
Give one example in the given cases:-
A force changes the size of a body
Give one example in the given cases:-
A force changes the shape of a body
Define Newton (the S.I unit of force)
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 body of mass 50g is moving with the velocity of 10 ms-1. It is brought to rest by a resistive force of 10 N Find.
1) the retardation and
2) the distance that the body will travel after the resistive force is applied.
Define 1 Dyne.
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?
To produce a displacement ______ is required.
Briefly explain how we experience a force in our daily life.
