Forces and Motion

For every action, there is a reaction

• reference point

• motion

• Newton's 3rd Law

• Non-contact force

Jane kicks a soccer ball across a grassy field. What force causes the ball to eventually roll to a stop?

• Friction

• motion

• contact force

• nothing at all

What is Newton's first law of motion?

• an object changes its state of motion when not acted on by another force

• the speed of an object

• position of an object

• An object does not change its state of motion unless acted on by another force

A force that acts at a distance

• reference point

• motion

• Non-contact force

• acceleration

A change in the position of an object

• motion

• acceleration

• reference point

• contact force

A place or object used to determine if a object is in motion

• non-contact force

• motion

• Newton's First Law

• reference point

Which of the following is a contact force?

• air resistance

• dribbling a ball

• rubbing your hands together

• all of the above

Which of the following would cause an acceleration?

• a decrease in mass

• a increase in force

• a decrease in force

• all of the above

In a game of tug-a-war, what happens when the forces exerted by team A are greater than the forces of Team B?

• Both teams will stand still

• Both teams will fall

• Both teams will move

• Both teams will let go

A car runs out of gas while moving forward on a flat, straight road. The car keeps rolling for a while because of

• it has inerita

• it has gas

• it is slidng

• it has friction