Force and Motion

Which force acts against the motion of an airplane as it flies through the air?

• friction
• momentum
• gravity
• inertia

Two identical soccer balls are rolling toward each other.  When the balls collide, Ball 1 is pushed back in the direction it had come.  Ball 2 keeps moving in the same direction.  What can you conclude about Ball 2 based on this information?

• Ball 2 had more mass.
• Ball 2 had more momentum.
• Ball 2 had more friction.
• Ball 2 had more air.

Harry placed a vase on his mother’s table.  He observed that the vase did not move.  If the vase is not moving, what forces are acting on the vase?

• The upward force of the table and the downward force of the table are working to keep the vase in place.
• Gravity is pushing down and friction is preventing the vase from sliding.
• There are no forces acting on the vase when it is not moving.
• The vase is pushing down harder than the table is pushing up

What term is used to describe the amount of motion that an object possesses?

• momentum
• inertia
• friction
• gravity

What causes an object to move?

• friction forces
• balanced forces 
• unbalanced forces
• the absence of forces

When an object is falling toward Earth, what force is pushing up on the object?

• friction from the air
• gravity
• the objects weight
• acceleration

What is the push or pull on an object called?

• drag
• force
• lift
• motion

The forward motion of a swimmer is caused by which force?

• drag
• lift
• thrust
• pull

The motion of any object can be defined by its position and how that position changes over which of the following?

• force
• direction
• position
• time

The force of friction acts in which direction?

• the direction that an object is moving
• the direction that an object came from
• the opposite direction that an object is moving
• the direction that an object is spinning