An average force of 280 N acts for 1.2 seconds on a 78 kg circus performer as he is shot out of a cannon. (a) What impulse is applied to the performer? (b) What is the speed of the performer as he leaves the cannon?

1 Answer
Apr 5, 2018

I tried this:

Explanation:

The Impulse I can be evaluated as:

I=F_(av)Deltat=280*1.2=336Ns

For the velocity we use the Theorem of Impulse and Change in Momentum consisdering the initial velocity of the performer as zero.

I=Deltap

F_(av)Deltat=mv_f-mv_i

336=(78*v_f)-(78*0)

rearranging:

v_f=336/78=4.3m/s