2. -2 points SerCP10 6 P03 My Notes Ask Your A pitcher claims he can throw a 0.1

Question

2. -2 points SerCP10 6 P03 My Notes Ask Your A pitcher claims he can throw a 0.147-kg baseball with as much momentum as a 2.40-g bullet moving with a speed of 1.50 x 103 m/s (a) What must the baseball's speed be if the pitcher's claim is valid? (b) Which has greater kinetic energy, the ball or the bullet? O The ball has greater kinetic energy o Both have the same kinetic energy O The bullet has greater kinetic energy Need Help? ed My Notes Ask Your -3 points SerCP10 6.P005 Drops of rain fall perpendicular to the roof of a parked car during a rainstorm. The drops strike the roof with a speed of 11 m/s, and the mass of rain per second striking the roof is 0.046 kg/s (a) Assuming the drops come to rest after striking the roof, find the average force exerted by the rain on the roof magnitude IN direction (b) If hailstones having the same mass as the raindrops fall on the roof at the same rate and with the same speed, how would the average force on the roof compare to that found in part (a)? (Assume the hailstones bounce back up off the roof.) O The magnitude would be half that in part (a) O The magnitude would be the same as in part (a) O The magnitude would be double that in part (a) O The magnitude would be one fourth times in part (a) Noed Help?Read it

Explanation / Answer

(a) Conserving momentum

2.4*10^(-3)*1.5*10^3=0.147*v

v=24.5 m/s

(b)

Kinetic Energy of ball=44.1 J

kinetic energ of bullet=2700 J

So the bullet have more kinetic energy

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