When playing shuffleboard a player exerts a constant force o

When playing shuffleboard, a player exerts a constant force of 2.3 N on an initially stationary puck, at an angle 55° below the horizontal. If the player pushes the puck for 1.5 m, how fast is the puck moving when it is released? The mass of a puck is 0.49 kg. Ignore the force of friction.

Solution

Horizontal force

F_H=FCos55 =2.3Cos55 =1.32 N

Since

Work done =Change in Kinetic energy

F_Hd =(1/2)mV²

1.32*1.5 =(1/2)*0.49*V²

V=2.84 m/s