Forces Exam Part 1

• The vectors are pulling in opposite directions.

• The force vectors will represent balanced forces.

• The magnitudes of the force vectors are the same.

• The net force of these vectors will be unbalanced.

• friction

• magnetism

• wind speed

• electrical force

• 150 N

• 200 N

• 250 N

• 400 N

Which of the following best describes the velocity of an object?

• 30 m

• 30 m/s

• 30 m/s east

• 30 m/s²

In a billiards game, the white cue ball hits the black ball, moving the black ball to the right while the cue ball moves to the left.

If the action force is applied by the cue ball to the black ball, which force is the reaction force?

• the force of gravity on the cue ball

• the friction applied by the table to the cue ball

• the force applied to the black ball by the cue ball

• the force applied by the stick to the cue ball

Angela blows air into a balloon and holds the end of it closed with her fingers. When she lets go of the end of the balloon, Angela observes that the release of the air propels the balloon.

The propelling of the balloon from the release of the air is an example of which of Newton’s laws?

• For every action, there is an equal and opposite reaction.

• A force of attraction exists between any two objects with mass.

• The force of an object is the product of its mass multiplied by its acceleration.

• An object in motion tends to stay in motion unless an unbalanced force acts upon it.

During a classroom discussion on motion, the teacher instructs the class to write down something that specifically addresses Isaac Newton’s second law of motion. Which of these responses would best represent the second law?

• For every action there is an equal and opposite reaction.

• Every object continues at rest unless acted on by outside forces.

• Acceleration depends on the force applied and the mass of an object.

• Every object attracts every other object and the force is proportional to their masses.

Which of these is an example of Newton’s first law of motion?

• A baseball hit with a baseball bat travels faster than a bowling ball hit with the same force.

• A basketball bounces on the ground with the same force that the ground pushes up on the ball.

• A person jumps to a dock from a boat, and the boat moves away from the dock.

• A person standing on a bus moves backward when the bus suddenly moves forward.

What is the net force and direction of this book?

• 2N to the left
• 2N to the right
• 38N to the left
• 38N to the right

If Billy is pulling with 10N of force to the left.  Which of the following would Susie have to do to keep the rope balanced?

• Pull in the opposite direction with a force of 10N
• Pull in the same direction with a force of 10N
• Push in the same direction with a force of 20N
• Push in the opposite direction with a force of 20N