# Exam 3 Preap Physics Numbers 11-15 2016

5 Questions | Total Attempts: 152

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• 1.
11.  When the net force acting on an object is 0 N,
• A.

A. the objectâ€™s motion changes.

• B.

B. there are no forces acting on the object.

• C.

C. the forces acting on the object are balanced.

• D.

D. the forces acting on the object are unbalanced.

• 2.
12. If a nonzero net force is acting on an object, then the object is definitely
• A.

A. at rest.

• B.

B. being accelerated.

• C.

C. moving with a constant velocity.

• D.

D. losing mass.

• 3.
13. Which statement about the acceleration of an object is correct? (Hint:  Use the equation.)
• A.

A. The acceleration of an object is directly proportional to the net external force acting on the object and inversely proportional to the mass of the object.

• B.

B. The acceleration of an object is directly proportional to the net external force acting on the object and directly proportional to the mass of the object.

• C.

C. The acceleration of an object is inversely proportional to the net external force acting on the object and inversely proportional to the mass of the object.

• D.

D. The acceleration of an object is inversely proportional to the net external force acting on the object and directly proportional to the mass of the object.

• 4.
14.  A truck and a car uniformly accelerate from rest to a velocity of 3.0 m/s in equal time intervals. The truck is ten times as massive as the car. Which of the following statements is correct?
• A.

A. The acceleration of the truck is 1/10 that of the car.

• B.

B. The truck travels 1/10 the distance of the car.

• C.

C. The force on the truck is 10 times the force on the car.

• D.

D. all of the above

• 5.
15. In which situation is the net force acting on a car zero?
• A.

A. The car increases speed and changes direction.

• B.

B. The car increases speed but does not change direction.

• C.

C. The car maintains its speed but changes direction.

• D.

D. The car maintains both its speed and direction.