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 Questions:
410. Work
420. Work
425. Energy type for a dropped book
430. Energy type for a diver
435. Energy type for a rolling ball
440. Standing wave energy

 
410.  In which situation is work done on the object?

1) A book falls a distance of 1 meter through the air.
2) A child pulls a toy truck with a string and moves it 8 ft.
3) A skater glides 50 feet across the ice while holding his partner over his head.

a) 1 only
b) 2 only
c) 3 only
d) 1 and 2
e) 2 and 3
f) 1 and 3
g) 1, 2 and 3

Fundamentals of Sound reference: Sec. 10-A.
 

420.  Four people are moving a piano up a ramp.  One is pulling the piano with a rope, another is pushing it directly up the ramp, and the remaining two are pushing the piano sideways to make sure it does not stray from a straight path up the ramp.  Which of the workers does work on the piano?

a) All of them
b) Workers 1 and 3 only
c) Workers 2 and 4 only
d) Worker 3 only
e) Worker 1 only
f) None of them does any work

Fundamentals of Sound reference: Sec. 10-A.
 

425.  A book is dropped from a table onto the floor. What type of energy does it have half way to the floor?

a) Kinetic energy only
b) Potential energy only
c) Both kinetic and potential energy
d) None of the above

Fundamentals of Sound reference: Sec. 10-A.
 
 

430. A diver comes off a diving board. What type of energy does she have at the highest point in her dive?

a) Kinetic energy only
b) Potential energy only
c) Both kinetic and potential energy
d) None of the above

Fundamentals of Sound reference: Sec. 10-A.
 
 

435. A ball rolls down a ramp. What type of energy does it have when it reaches the bottom?

a) Kinetic energy only
b) Potential energy only
c) Both kinetic and potential energy
d) None of the above

Fundamentals of Sound reference: Sec. 10-A.
 
 

440. Where in the cycle of this standing wave is the energy all kinetic? Neglect any effects of gravity.

a)   b)   c)

Fundamentals of Sound reference: Sec. 10-C.
 

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