Question

Lauren was playing hockey and took a 90 km/hr slap shot at the goal, 10 m away. If the goalie must move her glove 0.50 m to stop the puck, and her reaction time is 0.18 seconds, how fast must she move her glove?

Answer 1

First convert 90 km/h to 25 m/s. The puck reaches the goal in 10/25 = 0.40 s.

She has 0.22 s to move her glove 0.50 m after her reaction time delay.

0.50/0.22 = ? m/s