Question

A hockey ball of mass 200g travelling at 10 ms¹is struck by a hockey stick so as to return along a straight path in with a velocity of 5m¹. Find the change of momentum

Answer 1

Answer:

data.

convert 200g into kg.

m = 200/1000

m = 0.2kg

Δv =10 -5 =5 m/s

P = mv

= 0.2×5

P = 1 N. s

it indicates that there's no change in the momentum.

Hope it helps..

Answer 2

Answer:

The change in momentum of hockey ball = 3 kg

Explanation:

$\huge\colorbox{yellow}{Given\:-}$

• Mass of hockey ball = 200g = 0.2 kg

• Initial velocity (v1) = 10 ms¹

• Final velocity (v2) = 5 ms¹

$\huge\colorbox{yellow}{To\:Find\:-}$

Change in momentum of hockey ball by the force applied by the hockey stick

$\huge\colorbox{yellow}{Solution\:-}$

Initial momentum of hockey ball

= 0.2 kg × 10 Ms = 2 kg ms

Final momentum of hockey ball

= 0.2 kg × -5 Ms = - 1 kg ms

Change in momentum of hockey ball

= 2 - (-1) = 2 + 1

$\boxed{\pink{ = > 3 \: kg \: ms}}$

$\huge\colorbox{yellow}{Thank\:You}$