Question

A 6 kg rock rolls down a hill with a momentum of 12 kg m/s. Work out the velocity of the rock.

Answer 1

The velocity of the rolling rock will be 2 m/s.

How to solve this problem

Given:

Mass of rock, M = 6kg

Momentum of the rock, P = 12 kgm/s

To find:

Velocity of the rock, v =?

Solution:

The formula relating momentum with mass and velocity is P = mv.

to find velocity,

v= P/m

v = 12/6

Velocity v= 2 m/s

So the answer will be 2 m/s.

See a similar question here:
What is the Formula to calculate momentum?

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