Question

Determine the impulse exerted in each of the following conditions: A. A dynamics cart experienced a net force of 25 N going [ East] for a time interval of 3.2 seconds B. A force of 120 N hits a baseball by a bat with a time interval of 0.05 seconds. C. A 12 kg rock falling from a cliff for 3.0 seconds.

Answer 1

A. The impulse is

$$I=Ft=25·3.2=80\text{ kg-m/s East}.$$

B. In this case,

$$I=Ft=120·0.05=6\text{ kg-m/s}.$$

C. Here:

$$I=mgt=12·9.8·3=353\text{ kg-m/s}.$$