A pitcher claims he can throw a 0.146-kg baseball with as much momentum as a 2.9

Question

A pitcher claims he can throw a 0.146-kg baseball with as much momentum as a 2.90-g bullet moving with a speed of 1.50 103 m/s.
(a) What must the baseball's speed be if the pitcher's claim is valid?
______________m/s

(b) Which has greater kinetic energy, the ball or the bullet?
A.Both have the same kinetic energy.
B.The ball has greater kinetic energy.
C.The bullet has greater kinetic energy.

Explanation / Answer

both momentum are equal a)2.90*10^(-3)*1.5*10^3 = .146*v => v = 29.79m/s b) kinetic energy = .5*momentum* velocity since the momentum of the two is same the one with higher speed has higher energy => the basketball B Ans

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