Two bodies A & B of the same mass are moving with velocities v and 3v respectively. Compare their (a) inertia (b) Momentum (c) the force needed to stop them in the same time.
Answers
Answer:
(a) Inertia is the tendency of a body to remain in fact of motion or remain static until and unless an external force acts on the body and since it depends on mass of body hence M1: M2 = 1:1 .
(b) The momentum of a body is also called as mass that is in motion if a body has mass and is moving it will definitely have momentum so M1V:M2V ⇒ 1:3 .
(c) Force on a body is also defined as Momentum per unit time hence, M1V/T : M2V/T = 1:3.
Answer:
Explanation:
(a) Since inertia is a measure of mass which is same for both bodies, so the ratio of inertia for two bodies will be
1 ; 1
(b) Momentum
P=m×v
P1 = m × v = mv
P2 = m × 3v = 3mv
P2 / P1 = 3mv / mv
= 3 / 1
(c) Force
F×T=Momentum
F=
T
Momentum
F
1
=
1
1
F
2
=
1
3
F
2
F
1
=
3
1