Newton's Law and Friction

A student inflates a balloon attached to a plastic straw. A string is threaded through the straw and tied to opposite ends of the room. When the air in the balloon is released, the balloon travels the length of the string. Which of Newton's laws explain this?

• The law of action-reaction

• Newton's law of magnetism

• The law of force and acceleration

• The law of gravity

According to Newton's second law, if you increase the force applied to an object :

• it accelerates more
• it doesn't move
• you get more inertia
• it decelerates

Which of the following would be a good example of Newton's third law of motion?

• An air freshener hanging from the rear-view mirror of a car hangs still while the car moves forward with a constant acceleration

• A carbon dioxide-fueled rocket launches upward into the air as carbon dioxide gas accelerates toward the ground below the rocket

• Two balls of different masses are rolled with the same force, resulting in the ball with larger mass stopping faster than the ball with the smaller mass.

• All of the above

What Newtons law does this picture represent

• Newtons 2nd law 
• Law of gravity 
• Newtons 1st law
• Newtons 5th law

Match the following Law of motion with the correct example

• Bouncing the ball on the court is the action, the floor pushing the ball back up is the reaction

• Newton's 1st law of motion

• Roll a ball across smooth/rough surfaces. The ball rolls faster on smooth because less fiction

• Newton's 2nd law of motion

• Hit a ball with 2 different forces, the ball will have greater acceleration due to larger force

• Newton's 3rd of motion

The upward force acting on your parachute as it fell through the air is _________.

• air force
• weight
• air resistance
• upheaval

If you travel to Mars, where gravity is less than Earth's gravity, what will happen to your mass and weight?

• Your mass and weight will both be greater than on Earth.
• Your mass and weight will both be less than on Earth.
• Your mass will be the same, but your weight will be less than on Earth.
• Your mass will be less than on Earth, but your weight will be the same.

When a woman stands with two feet on a scale, the scale reads 280 N. When she rides in an elevator that is accelerating up then the scale will read

• less than 280 N
• more than 280 N. 
• 280 N.
• 140 N

A book weighs 4 N. When held at rest in your hands, the net force on the book is
 

• 0 N.
•  0.4 N.
•  4 N.
•  39 N.

Newton's _____ Law of Motion means that for every force there is a reaction force that is equal in size, but opposite in direction.

• First
• Second
• Third
• Fourth