Multiple Choice – 10 Questions
x 2pts =
Please write your answers in the space provided.
# correct
score
1.
If you stand on a spring scale in your bathroom at home, it reads 600 N, which means
your mass is 60 kg.
If instead you stand on the scale while moving down and
slowing down with acceleration 2 m/s
2
downward in an elevator, how many newtons
would it read?
A. 1200 N
B. 720 N
C. 600 N
D. 480 N
E. 120 N
2.
A 400 kg car moving at 30 m/s breaks to a stop in 100 meters. The average
frictional force (in Newtons) acting on the car is:
A. 120
B. 400
C. 1200
D. 1800
E.
12000
3.
If a 60kg sprinter can accelerate from a standing start to a speed of 10 m/s in 2 s, what
average power is generated?
A. 600 W
B. 1200 W
C. 1500 W
D. 3000 W
4.
A car speeds up at a constant rate of 4 m/s
2
. An identical car takes a right turn with 4 m radius at
constant speed of 8 m/s. Which of the following statements is correct?
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 Spring '07
 GregoryFrancis
 Force, Friction, #, net force, 2pts, 3 kg

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