1.5 Solving Problems with Magnets

Multiple Choice

Why is it important to find a stud in the wall before hanging a heavy picture?

• Because the wall material alone is not strong enough to hold heavy objects

• Because it looks better

• Because it is easier to reach

• Because it saves time

Multiple Choice

Which of the following are reasons why a magnet can help find a stud in the wall?

• Magnets are attracted to metal nails and screws in the studs

• Magnets can see through walls

• Magnets are attracted to wood

• Magnets can detect electricity

Multiple Choice

A stud is a wooden or metal ___ inside a wall.

• post

• wire

• pipe

Multiple Choice

Which tool is used to find nails inside a wall by using a magnet?

• Stud finder

• Hammer

• Screwdriver

• Wrench

Multiple Choice

How do maglev trains reduce friction compared to ordinary trains?

• By using magnets to float above the track

• By using rubber wheels

• By increasing the weight of the train

• By using more metal tracks

Multiple Select

Which of the following are challenges engineers consider when designing trains?
(hint: choose 3 options)

• Reducing friction

• Increasing friction

• Wear and tear of moving parts

• Making trains float above tracks

Multiple Select

What challenges that meet engineers when they look for a solution to a problem?

• Time

• Cost

• Materials

• Limits

• Color