A golf ball with mass 5 times 10^-2 kg is struck with a club as it approached to

Question

A golf ball with mass 5 times 10^-2 kg is struck with a club as it approached to the club with a velocity - 40 m/s. Assuming that the ball leaves the club face with a velocity of +44 m/s, find the magnitude of the impulse due to this collision. An archer stands at rest on a frictionless ice surface and fires a 400 g arrow horizontally at 47 m/s. The combined mass of archer and bow is 60 kg. With what velocity does the archer move backward after firing the arrow? A 40 kg boy and a 35 kg girl on ice skates stand facing each other. If the girl pushes the boy backward so he ends up sliding with a speed of 1.4 m/s, at what speed does the girl recoil? An SUV with mass 1.8 times 10^3 kg is travelling eastbound with a speed of 20 m/s. A compact sedan with a mass of 9.0 times 10^2 kg is travelling westbound at 16 m/s. The two cars collide head-on becoming entangled. Find the speed of the entangled wreck after collision. Find the change in kinetic energy of the whole system consisting of both cars.

Explanation / Answer

7)Impulse is change in momentum

J = m (v2 - v1)

J = 5 x 10^-2 [ 44 - (-40) ] = 4.2 kg-m/s

Hence, the impulse is, J = 4.2 kg-m/s

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