Question

a hockey ball of mass 200g travelling at 10ms-1 is struck by a hockey stick so as to return it's along its original path with velocity at 5 ms-1 calculate the change of momentum occurred in the motion of the hockey ball by the force applied by the hockey stick​

Answer 1

Answer:

it could be 534..................

Answer 2

Given:

• mass =200g

•speed=10m/s

•velocity (v2)=5m/s

To Find :

• The change of momentum occurred in the motion of the hockey ball by the force applied by the hockey stick =?

Formula :

$\red \bigstar \boxed{ \sf{change \: in \: momentum = final \: momentum - initial \: momentum}}$

Solution :

$\bullet \bf \: mass \: \: of \: ball(m) = 200g = 0.2kg$

• Initial velocity of ball (u)=10m/s

• Final velocity of ball (v) =5m/s

$\\ \therefore \rm \: change \: in \: momentum = final \: momentum - initial \: momentum$

$\\ \implies \sf \: change \: in \: momentum = mv - mu \\ \\ \implies \sf \: change \: in \: momentum = 0.2 \times ( - 5 - 10) \\ \\ \implies \sf \: change \: in \: momentum = - 3kgm {s}^{ - 1} \\ \\ \implies \sf \: change \: in \: momentum = - 3 \: newton \: sec$

Therefore, Change in momentum is -3Ns.