Kap 4

The object is moving with a constant acceleration.

A constant net force acts on an object. Which of the following best describes the object's motion? A constant net force acts on an object. Which of the following best describes the object's motion? The object is moving with a decreasing acceleration. The object is moving with a constant acceleration. The object is moving with a constant velocity. The object is moving with an increasing acceleration. The object is at rest; its position is constant.

A

A fish weighing 16 N is weighed using two spring scales, each of negligible weight, as shown in the figure. What will be the readings of the scales? Each scale will read 16 N. Each scale will read 8 N. The top scale will read 16 N, and the bottom scale will read zero. The scales will have different readings, but the sum of the two readings will be 16 N. The bottom scale will read 16 N, and the top scale will read zero.

A)

A large truck collides head-on with a small car. The car is severely damaged as a result of the collision. According to Newton's third law, how do the forces acting between the truck and car compare during the collision? A) The force on the truck is equal to the force on the car. B) The force on the truck is larger than the force on the car. C) The car does not exert a force on the truck during the collision. D) The truck does not exert a force on the car during the collision. E) The force on the truck is smaller than the force on the car.

B

An object is at rest on a tabletop. Earth pulls downward on this object with a force equal in magnitude to mg. If this force serves as the action force, what is the reaction force in the action-reaction pair? A) the object pushing down on the table B) the object pulling upward on Earth C) the table pushing up on the object D) Earth pushing upward on the table E) the table pushing down on Earth

E

An object is moving in the absence of a net force. Which of the following best describes the object's motion? An object is moving in the absence of a net force. Which of the following best describes the object's motion? A The object will stop moving immediately and remain at rest until acted on by a net force. B The object will continue to move with a constant speed, traveling in a circular path. C The object will speed up at a constant rate until it reaches a maximum speed. D The object will slow down at a constant rate until coming to rest. E The object will continue to move with a constant velocity.