Physics Test

B

A batter strike a baseball with a bat. Identify an action-reaction pair and describe the forces exerted by each

Acceleration (d)

A force unit is defined as the product of a mass unit and a unit of

C

A single force acting on an object is represented in a free-body diagram of the object by the following force vector: ^. Which of the following force vectors represents a single force acting on the object that will bring the object into equilibrium?

Ending and ascending

A student holds a 6-N block of wood from a spring balance in an express elevator that maintains constant velocity traveling between floors. A spring scale reading of 5.9 N indicates that the elevator is . . .

C

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?

D

During a three-part circus stunt, a clown holds a ball. The clown then tosses the ball upward. After realizing it, the ball is caught a few moments later from another clown on a trapeze. Which set of data could represent the normal force exerted by the ground is 690 N and that on the ball is 20 N.

D

In an action-reaction pair, the

B

In interactions of action-reaction pairs involving Earth and everyday objects the effect on Earth's motion is often negligible because

C

The change in the horizontal velocity of a 12-kg scooter is +0.5 m/s. What is the net horizontal force acting on it?

Force (b)

Units that measure weight are units of

A

Which of the following is true of inertia?

I, II, and III (d)

Which of the following statements describe force diagrams?

I, II, and III (d)

Which of the following statements describes an object in equilibrium?