Question

A hockey puck initially travelling to the right at 34 m/s. It moves for 7 before

coming to a stop. How far did it move in 7 seconds?
You can use kinematic equations

Answer 1

`x=119m`

Step-by-step explanation:

Hello,

In this case, since the hockey puck was moving at 34 m/s and suddenly stopped (final velocity is zero) in 7 seconds, we can first compute the acceleration via:

`a=(v_f-v_o)/(t)=(0m/s-34m/s)/(7s)\\ \\a=-4.86m/s^2`

In such a way, we can compute the displacement via:

`x=(v_f^2-v_o^2)/(2a)\\ \\x=(0^2-(34m/s)^2)/(2*-4.86m/s^2)\\ \\x=119m`

Best regards.