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Unformatted text preview: wer: q = – 1.6 × 10 –19 Record 1619 on the
answer sheet C 1619
.. 0 0 0 0 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 6 7 7 7 7 8 8 8 8 9 9 9 9 iii 1. The following statements all relate to a collision between any two objects on a
horizontal frictionless surface. Which of these statements is always true?
A.
B.
C.
D. 2. A 500 g rock is thrown straight down from a bridge to the water 5.20 m below.
If the rock strikes the water at a speed of 12.5 m/s, what was the initial speed of
the rock?
A.
B.
C.
D. 3. The kinetic energy of each object before and after the collision is the same.
The momentum of each object before and after the collision is the same.
The total momentum of the two objects before and after the collision is
the same.
With respect to the surface, the gravitational potential energy of each
object before and after the collision increases. 2.40 m/s
7.36 m/s
12.1 m/s
16.1 m/s The concept of mechanical energy deals with the idea that
A.
B.
C.
D. mechanical energy is the amount of energy saved by a mechanical device
mechanical energy is the sum of potential and kinetic energy
potential energy and kinetic energy are always equal
mechanical energy is a vector quantity 1 Use the following information to answer the next two questions.
Foundation piles for tall buildings are hammered into the ground using a “piledriver.” A piledriver similar to the one shown below lifts a 900 kg hammer
a distance of 3.50 m above the top of a pile, and then allows it to drop. Hammer guide
Hammer
3.50 m
Pile 4. The magnitude of the impulse delivered by the hammer to the pile is
A.
B.
C.
D. 61.8 kN.s
30.9 kN.s
7.46 kN.s
3.73 kN.s Use your recorded answer for Multiple Choice 4 to answer Numerical Response 1.*
Numerical Response
1. The impulse is delivered by this piledriver in 2.10 × 10–3 s. The magnitude of
the force that the hammer exerts on the pile, expressed in scientific notation,
is b × 10w N. The value of b is __________. (Record your threedigit answer in the numericalresponse sectio...
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This note was uploaded on 01/14/2014 for the course PHYSICS Physics 30 taught by Professor Quinlan during the Fall '09 term at Centennial High School.
 Fall '09
 Quinlan
 Physics

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