# Exam 3 Quiz #5

12 Questions | Attempts: 204
Share  Settings  • 1.
The length of a force vector represents the
• A.

Cause of the force

• B.

Direction of the force

• C.

Magnitude of the force

• D.

Type of force

• 2.
A free-body diagram represents all of the following except
• A.

The object

• B.

Forces as vectors

• C.

Forces exerted by the object

• D.

Forces exerted on the object

• 3.
In the free-body diagram shown to the right, which of the following is the normal force acting on the car?
• A.

5800 N

• B.

14,700 N

• C.

775 N

• D.

13, 690 N

• 4.
A car goes forward along a level road at constant velocity. The additional force needed to bring the car into equilibrium is
• A.

Greater than the normal force times the coefficient of static friction.

• B.

Equal to the normal force times the coefficient of static friction.

• C.

The normal force times the coefficient of kinetic friction.

• D.

Zero

• 5.
A small force acting on a human-sized object causes
• A.

A small acceleration

• B.

A large acceleration

• C.

No acceleration

• D.

Equilibrium

• 6.
Two forces act on an object. The magnitude of the net force acting on the object
• A.

Equals the sum of the magnitudes of the two forces.

• B.

Equals the difference in the magnitudes of the two forces.

• C.

Equals the average of the two forces.

• D.

Cannot be determined from the given information.

• 7.
A newton is equivalent to which of the following quantities?
• A.

Kg

• B.

Kg•m/s^2

• C.

Kg•m/s

• D.

Kg•(m/s)^2

• 8.
If a nonzero net force is acting on an object, then the object is definitely
• A.

At rest

• B.

Being accelerated

• C.

Moving with constant velocity

• D.

Losing mass

• 9.
A cabinet initially at rest on a horizontal surface requires a 115 N horizontal force to set it in motion. If the coefficient of static friction between the cabinet and the floor is 0.38, what is the normal force exerted on the cabinet?
• A.

303 N

• B.

44 N

• C.

12 N

• D.

1128 N

• 10.
A 20.0 kg trunk is pushed across the floor of a moving van by a horizontal force. If the coefficient of kinetic friction between the trunk and the floor is 0.255, what is the magnitude of the frictional force acting on the trunk?
• A.

3 N

• B.

769 N

• C.

196 N

• D.

50 N

• 11.
A passenger with a mass of 60.0 kg is standing in a subway car that is accelerating at 3.70 m/s2. If the coefficient of static friction between the passenger’s shoes and the car floor is 0.455, will the passenger be able to stand without sliding? Prove your answer.
• A.

Yes; Fs= 268 N and Fa= 222 N

• B.

No; Fs= 268 N and Fa= 222 N

• C.

Yes; Fs= 222 N and Fa= 268 N

• D.

No; Fs= 222 N and Fa = 268 N

• 12.
A 90.0 kg skier glides down a slope with an incline of 17.0°. What frictional force is needed for the skier to move at a constant velocity?
• A.

883 N

• B.

258 N

• C.

844 N

• D.

323 N

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