We considered the collision of a karate expert’s hand with a concrete block. Based on the graphs in Figure 1.31, the initial downward speed of the fist with mass 0.75 kg is about −13 m/s and the collision time is approximately 25 ms. Find the impulse and the average force exerted on the block by the fist during the collision.

In Figure 1.31

Transcribed Image Text:

d (cm) (s/w) a 10 5 0 -5 0 -5 > -10 -15 0 0 (a) 10 20 t (milliseconds) (b) 10 20 t (milliseconds) 30 30 (c)