Question

Two balls A and B of masses m and 2m are in motion with velocities 4v and v respectively. Compare
a. their inertia
b. their momentum
c. the force needed to stop them in the same time.

plz don't cppy and pa$te..the question is different from other​

Answer 1

Answer:

a. 1:2, b. 2:1, c. 2:1

Explanation:

a. Mass is the Inertial property of any object.

Therefore ratio of their Inertia is 1:2

b. Momentum = Mass*Velocity

Therefore Momentum of A = m*4v = 4mv

similarly Momentum of B = 2mv

Therefore the ratio of Momentum 2:1

c.

$Force = \frac{Change-in-velocity}{time}\times Mass (Time is same for A and B, let the time be t sec) \\\\\therefore Force on A =\frac{4v-0}{t}\times m = \frac{4mv}{t} \\\\\therefore Force on B =\frac{v-0}{t}\times 2m = \frac{2mv}{t} \\\\\\\therefore Ratio of force = 2:1$