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
How is force related to the momentum of a body?
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.
Fill in the empty spaces
Can you give example for contact and non-contact forces?
Give two examples to verify that a force tends to change the static condition of a body.
To produce a displacement ______ is required.
Derive the unit of force using the second law of motion. A force of 5 N produces an acceleration of 8 m s–2 on a mass m1 and an acceleration of 24 m s–2 on a mass m2. What acceleration would the same force provide if both the masses are tied together?
The trees are greenish. They are greenish at the tip too. How does the water rise upward in a tree or plant against the force of gravity?
The moon attracts Earth with a force of 1020 N, and then the force with which the Earth attracts the moon is ______.
