2/25/25 Bellwork Review

Which 2 statements are true about the correct pair for forces.

• Air and pushing is a contact forces.

• Air and magnetic fields are noncontact forces.

• Gravity and air is a contact force.

• Magnetic field and gravity are noncontact forces.

According to the image, where are the magnetic fields the strongest?

• The magnetic field is strongest in the middle of the magnet.

• The magnetic field is strongest where the lines are closest together.

• The magnetic field is strongest at the poles of the magnet.

• The magnetic field is strongest where the lines are furtherest apart.

A 5kg book and a 1kg ball are dropped from the same height.  Which one hits first and why?

• They hit at the same time because Earth's gravity is pulling them at the same rate.

• The book and ball hit at different angles because of the Earth's gravity pulling them.

• The 1kg ball hits first because it is smaller.

• The 5kg book hits first due to its weight.

A 5kg book and a 1kg ball are dropped from the same height.

 Which objects have gravity in this question?

• Only the 5kg book has gravity.
• Only the 1kg ball has gravity.
• Only the Earth has gravity.

• The 5kg book, the 1kg ball and Earth have gravity.

An electric motor is composed of loops of wire wrapped in loops surrounding

a magnet, but not touching the magnet.  

How does the electric motor actual create motion?

• The electric motor creates motion by spinning the magnet inside the wire loops faster and faster.

• Electricity creates a magnetic field, then the magnet and electricity interact causing them to create motion

• The electric motor creates motion by heating the wire loops until they expand causing combustion.

• The electric motor generates motion by using a battery to use force push the magnet away.

When light waves are transmitted from one medium to another, they also ______in different directions.

• stop

• slow down then stop

• speed up then stop

• bend