Advertisements
Advertisements
Question
Give two examples each of contact and non-contact forces.
Solution
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.
APPEARS IN
RELATED QUESTIONS
Give one example in the given cases:-
A force moves a stationary body
Give one example in the given cases:-
A force changes the size of a body
Complete the following sentence:
The mass of a body remains constant till the velocity of the body is ..........
Define 1 kgf how is it related to Newton?
Complete the following:
Force = mass x ............
Complete the following:
1 N = ............kgf (approx)
A body of mass 1 kg is thrown vertically up with an initial speed of 5 m s-1. What is the magnitude and direction of force due to gravity acting on the body when it is at its highest point? Take G = 9.8 n kg-1
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.
Turning a nut with a spanner having a short handle is so easy than one with a long handle.
Which of the following statement is not correct for an object moving along a straight path in an accelerated motion?
