1) the same 2) twice as much 3) four times as much 4) half as much
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Transcript of 1) the same 2) twice as much 3) four times as much 4) half as much
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1) the same
2) twice as much
3) four times as much
4) half as much
5) you gain no PE in either case
Two paths lead to the top of a big Two paths lead to the top of a big
hill. One is steep and direct, while hill. One is steep and direct, while
the other is twice as long but less the other is twice as long but less
steep. How much more potential steep. How much more potential
energy would you gain if you take energy would you gain if you take
the longer path?the longer path?
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How does the work required to
stretch a spring 2 cm compare
with the work required to
stretch it 1 cm?
1) same amount of work
2) twice the work
3) 4 times the work
4) 8 times the work
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A mass attached to a vertical
spring causes the spring to
stretch and the mass to
move downwards. What can
you say about the spring’s
potential energy (PEs) and
the gravitational potential
energy (PEg) of the mass?
1) both PEs and PEg decrease
2) PEs increases and PEg decreases
3) both PEs and PEg increase
4) PEs decreases and PEg increases
5) PEs increases and PEg is constant
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Three balls of equal mass start from rest and roll down different
ramps. All ramps have the same height. Which ball has the
greater speed at the bottom of its ramp?
1
4) same speed
for all balls
2 3
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A truck, initially at rest, rolls A truck, initially at rest, rolls
down a frictionless hill and down a frictionless hill and
attains a speed of attains a speed of 20 m/s20 m/s at the at the
bottom. To achieve a speed of bottom. To achieve a speed of
40 m/s40 m/s at the bottom, how many at the bottom, how many
times higher must the hill be?times higher must the hill be?
1) half the height
2) the same height
3) 2 times the height
4) twice the height
5) four times the height
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x
66A box sliding on a frictionless flat surface runs into a fixed spring, which compresses a distance x to stop the box. If the initial speed of the box were doubled, how much would the spring compress in this case?
1) half as much
2) the same amount
3) 2 times as much
4) twice as much
5) four times as much
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1) Paul
2) Kathleen
3) both the same
Paul and Kathleen start from rest at the Paul and Kathleen start from rest at the
same time on frictionless water slides same time on frictionless water slides
(of the same height) with different (of the same height) with different
shapes. At the bottom, whose velocity shapes. At the bottom, whose velocity
is greater?is greater?