Exam 3 Quiz #5

12 Questions | By Amoverby | Updated: Mar 21, 2022 | Attempts: 204

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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