Physics Principles and Problems 2009

Chapter 4: Forces in One Dimension

Standardized Test Practice

1
A spring scale reads 25 newtons as it pulls a 5.0-kg mass across a table. What is the magnitude of the force exerted by the mass on the spring scale?
A)50 N
B)25 N
C)5.0 N
D)125 N
2
A net force of 9.0 newtons accelerates a wagon at 3.0 m/s2. What net force would be required to accelerate the same wagon at 6.0 m/s2.
A)3.0 N
B)6.0 N
C)9.0 N
D)18 N
3
What is the force of gravity on a person who has a mass of 60.0 kg?
A)60.0 N down
B)294 N down
C)480 N down
D)588 N down
4
The free-body diagrams below show four ways that two different forces could be exerted on an object.

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In which diagram will the object move toward the left?
A)Diagram 1
B)Diagram 2
C)Diagram 3
D)Diagram 4
5
Two people are paddling a row boat. Each exerts a horizontal force of 315 N toward the back of the boat. The water resists the motion of the boat with a force of 200 N. What is the magnitude of the net force on the rowboat?
A)630 N
B)430 N
C)830 N
D)315 N
6
Two people are paddling a row boat. Each exerts a horizontal force of 315 N toward the back of the boat. The water resists the motion of the boat with a force of 200 N. If the combined mass of the boat and the two people in it is 215 kg, what is the acceleration of the rowboat?
  Need a Hint?
A)2.93 m/s2 forward
B)2.00 m/s2 forward
C)0.683 m/s2 forward
D)1.47 m/s2 forward
7
Two dogs play tug-of-war with a rope toy that has a mass of 0.25 kg. If one dog pulls on the toy with a force of 120 N to the right and the other dog pulls in the opposite direction with a force of 130 N to the left, what is the horizontal acceleration of the toy?
  Need a Hint?
A)10 m/s2 to the right
B)10 m/s2 to the left
C)40 m/s2 to the left
D)40 m/s2 to the right
8
A net force of 1.00 newtons accelerates an object at 5.00 meters per second per second. What net force would be required to accelerate the same object at 10.0 meters per second per second?
A)0.5 N
B)1.0 N
C)2.0 N
D)50 N
9
A 15.0 kg shopping cart is accelerated uniformly from rest to a speed of 2.00 m/sin 1.50 s. What is the magnitude of the force producing this acceleration?
A)20.0 N
B)11.3 N
C)30.0 N
D)22.5 N
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