a) To the nearest hundredth of a joule*sec what is the impulse? b) If the mass o

Question

a) To the nearest hundredth of a joule*sec what is the impulse?
b) If the mass of the ball in is 3.18 and its velocity before collision is 3.74 m/s, to the nearest hundredth of a m/s, what is its velocity after collision?

The answer for a) 18.09 J*sec and b) -1.95m/s

Please show me how to get these answers. Thank you.

In the collision pictured at the left the time of impact is 35.55 milliseconds and the average force is 508.83 newtons. a) To the nearest hundredth of a joule*sec what is the impulse? b) If the mass of the ball in is 3.18 and its velocity before collision is 3.74 m/s, to the nearest hundredth of a m/s, what is its velocity after collision? The answer for a) 18.09 J*sec and b) -1.95m/s

Explanation / Answer

Hi,

Impulse is I=F x t ; time must be second therefore 35.55 ms= 0.03555 sec.

I= 508.83 x 0.03555 =18.09

I=P = mV

18.09= 3.18 V

V = 5.688

V=Vfinal - V initial ; 5.688 =Vfinal -Vinital

5.688=3.74-(-Vinital)

Vinitial=1.95

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