Midterm quiz

What is a balanced force?

• When two forces are equal and do not change an object's motion.

• When one force is stronger than another.

• When an object is moving fast.

What happens when forces are balanced?

• The object moves faster.

• The object stays still or keeps moving at the same speed.

• The object changes direction.

If a dog pulls on a leash with a force of 10 N to the right, and a person pulls with a force of 5 N to the left, what type of force is acting on the dog?

• Balanced force.

• Unbalanced force.

• No force.

True or False: If two people are pushing a box in the same direction with the same force, the forces are balanced.

• True

• False

What does it mean to repel?

• To pull towards.

• To push away.

• To attract.

What is a lodestone?

• A type of magnetite.

• A type of clay.

• A type of crystal.

What does it mean to attract?

• To push away.

• To pull towards.

• To create heat.

What makes lodestone special?

• It can float on water.

• It can attract metal objects.

• It changes color.

If two objects with the same electric charge are brought close together, what will happen?

• They will attract each other.

• They will repel charge.

• They will explode.

What is an electric charge?

• A type of energy.

• A type of heat.

• A property of particles that has overall positive charge or negative charge.