Introduction to force

What is defined as push or pull?

• force

• motion

• vector

• speed

This type of force resists motion between two surfaces that are pressed together

• contact

• non-contact

• gravity

• friction

What force holds the planets in motion around the sound?

• magnetic

• electrical

• gravitational

• air resistance

What is the unit of force?

• Newton

• Kilogram

• Joule

• Meter

Which one is a contact force?

• Gravitational force

• electrostatic force

• magnetic force

• Upthrust

Which one is a non-contact force?

• Friction

• electrostatic force

• normal force

• air resistance

Device to measure force

• Forcemeter

• weighing scale

• meter ruler

• speedometer

Why is magnetic force considered to be a non-contact force?

• Magnets must be large in size in order to exert a force that is strong enough to notice

• Magnets push each other apart to increase the distance between them

• Magnets do not have to touch each other to experience a force

• Magnets must be far apart in order to exert a force