Two ice-hockey players simultaneously strike a puck with their sticks. the stick of one player exerts an eastward force on the puck of 12 n. the other player’s stick exerts a northward force of 15 n on the puck. assuming that there is no frictional force between the puck and the ice, what is the magnitude of the net horizontal force on the puck?

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s. when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?