Year 7 Forces

What is force?

• A push exerted on an object
• A push or pull exerted on an object
• A pull exerted on an object
• Nothing

Forces that have a net force of zero ( the object is still).

• Balanced force
• Unbalanced force

What is the net force?

• 5000 N right
• 4000 N right
• 40 N left
• 4000 N left

A force that acts where two objects touch

• Contact Force
• Non-contact Force
• Balanced Force
• Unbalanced Force

The sum of all forces acting on an object and direction

• Contact Force
• Balanced Force
• Unbalanced Force
• Net Force

Which of the following is an example of a contact force?

• A magnet picking up safety pins
• The moon orbiting Earth
• Wind blowing leaves across the yard
• An apple falling from a tree

Which is a factor that affects the strength of gravitational, magnetic, and electrostatic force fields?

• Mass
• Volume
• Distance
• Density

Distance and mass are two factors that affect

• Gravitational Force Fields
• Magnetic Force Fields
• Electric Force Fields
• Electrostatic Force Fields

Which of the following is an example of a non-contact force

• Static force picking up sugar
• Wind moving a sailboat
• A duck floating on water
• Your book lying on a table

Opposite magnetic forces _____ each other.

• Attract
• Repel