The SI unit for force is the:

A force that opposes motion is:

The force caused by a rope attached to the effected object is called

A force perpendicular to the surface on which an object sits, often balancing out gravity:

Choose all the forces present in the following situation:

A football reaches the top of its arc on the way from the quarterback to a receiver.

Choose all the forces present in the following situation:

A child pulls a toy car across the floor by a string.

Choose all the forces present in the following situation:

A bucket is being pulled out of a well by means of a rope.

Choose all the forces present in the following situation:

A car is parked and stationary on a hill.

Choose all the forces present in the following situation:

A skydiver is falling down towards the Earth with her parachute not yet opened.