What is a newton?(1 point)
A. a force that pulls objects toward the ground
B. a force that changes the motion of an object
C. the unit in which force is measured
D. a non-contact force
A tennis player swings and hits the ball away. How does the force of the tennis racket affect the motion of the ball?(1 point)
A. It does not change the speed or the direction of the ball.
B. It changes both the direction and the speed of the ball.
C. It changes the direction of the ball but not the speed.
D. It changes the speed of the ball but not the direction.
A net force is applied to a moving object. Which statement best describes the effect of the force?(1 point)
A. The force will cause a change in the momentum of the object.
B. The force will cause a change in the direction of the object.
C. The force will cause the object to come to a stop.
D. The force will cause the speed of the object to increase.
What is the momentum of an object?(1 point)
A. the net force acting on the object
B. the state of motion of an object with mass
C. the rate of change in the velocity of an object
D. the velocity of the object
The answers to the Quick Check questions are:
1. C. the unit in which force is measured (a newton is the unit for measuring force)
2. B. It changes both the direction and the speed of the ball.
3. A. The force will cause a change in the momentum of the object.
4. B. the state of motion of an object with mass (momentum is the product of an object's mass and velocity)