p A hockey player accelerates a puck (m = 0.167 kg) from rest to a velocity of 50 m/s in 0.0121s. The coefficient of friction between the puck and ice rink is 0.03. What is the force applied by the hockey stick to the puck?

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.