A
B
C
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 up 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?
4.
A trapeze artist of mass 90 kg hangs onto a trapeze bar and
swings as shown.
As he passes through point
B
, the force he
exerts on the trapeze bar is:
A.
less than 900 N
B.
equal to 900 N
C.
greater than 900 N
5.
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 Spring '07
 GregoryFrancis
 Force, Friction, Mass, #, kg, trapeze bar

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