contestada

A hockey puck has a mass of 0.121 kg and is at rest. a hockey player makes a shot, exerting a constant force of 32.5 n on the puck for 0.16 s. with what speed does it head toward the goal? m/s

Respuesta :

IssacAsimov
u = initial velocity = 0 m/s
v = final velocity
t=0.16 s
F = 32.5 N

From Newton's 2nd law,
F = ma
32.5=0.121a 
∴a=268.59 m/s² 

Now, use the kinematic equation to find v,
∴v=u+at 
v=0+268.59(0.16) = 42.97 m/s
Therefore, with this velocity puck will head towards the goal