20. Jamal is at the state fair playing some of the arcades. At one booth he throws a 0.50 kg ball forward with a velocity of 21.0 m/s in order to hit a 0.20 kg bottle sitting on a shelf, and when he makes contact the bottle goes flying forward at 30.0 m/s. What is the velocity of the ball after it hits the bottle? *Use g=9.8     a. 5.0 m/s b. 21 m/s c. 15 m/s d. 25 m/s e. 9.0 m/s   4. It is said that Galileo dropped objects off the Leaning Tower of Pisa to determine whether heavy or light objects fall faster. If Galileo had dropped a 5.0 kg cannon ball to the ground from a height of 12 m, what was the change in the Ep of the cannon ball?  *Use g=9.8     a. 340 J b. 590 J c. 170 J d. 60 J e. 460 J

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Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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20. Jamal is at the state fair playing some of the arcades. At one booth he throws a 0.50 kg ball forward with a velocity of 21.0 m/s in order to hit a 0.20 kg bottle sitting on a shelf, and when he makes contact the bottle goes flying forward at 30.0 m/s. What is the velocity of the ball after it hits the bottle? *Use g=9.8
 
 
a. 5.0 m/s
b. 21 m/s
c. 15 m/s
d. 25 m/s
e. 9.0 m/s
 

4. It is said that Galileo dropped objects off the Leaning Tower of Pisa to determine whether heavy or light objects fall faster. If Galileo had dropped a 5.0 kg cannon ball to the ground from a height of 12 m, what was the change in the Ep of the cannon ball? 
*Use g=9.8
 
 
a. 340 J
b. 590 J
c. 170 J
d. 60 J
e. 460 J
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