Newton's Laws of Motion

Multiple Choice

According to Newton's first law, what will an object at rest do if no external force acts on it?

• Accelerate

• Change direction

  
  

• Remain at rest

  
  

• Start moving

  
  

Multiple Choice

What is required to change the state of motion of a moving ball?

• A net external force.
• The ball hitting a wall.
• A decrease in speed.
• A change in temperature.

Multiple Choice

Which of the following has more inertia: a shopping cart or a train?

• Both have the same inertia

  
  

• Shopping cart

  
  

• It depends on speed

  
  

• Train

Multiple Choice

How would the absence of friction affect a marble traveling on a long, straight path?

• The marble’s speed would decrease.

  
  

• The marble’s speed would increase.

  
  

• The marble would stop immediately. 

  
  

• The marble would remain at constant speed.

  
  

Multiple Choice

Which of the following statements is true about inertia?

• Inertia only applies to objects in motion

  
  

• Inertia is a measure of an object's resistance to change in motion

  
  

• Inertia is greater for objects with less mass

  
  

• Inertia is independent of mass

  
  

Multiple Choice

Is the following acceleration and if so, which one?

A swimmer has 10 meters left in the race and he is neck-in-neck with his competitor. He has a surge of adrenaline and pulls ahead to win.

• Yes, this is acceleration since the swimmer starts to speed up to pull ahead.

  
  

• Yes, this is acceleration since the swimmer uses the wall to change directions.

  
  

• No, this is not acceleration since there is no speeding up, slowing down, or change in direction.

Multiple Choice

Is the following acceleration and if so, which one?

A dancer is warming up. She turns on music with a good beat and does 10 pirouettes in a row perfectly on the beat. (pirouette is a body spin in ballet)

• Yes, this is acceleration since the dancers is going a certain speed.

  
  

• Yes, this is acceleration since the dancer is changing direction when she spins.

  
  

• No, this is not acceleration since there is no speeding up, slowing down, or change in direction.

  
  

Multiple Choice

If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration?  (F=ma)

• Neither ball will accelerate due to the force applied.
• Both balls will have the same acceleration.
• The ball with a mass of 0.78 kg will have the greater acceleration.
• The ball with a mass of 0.52 kg will have the greater acceleration.

Multiple Choice

A 20 kg bike accelerates at 10 m/s².  what was the force?

• 100 N
• 200 N
• 150 N
• 250 N

Multiple Choice

Based on Newton's third law of motion, when a person on a skateboard throws a heavy concrete block to the north, the person will be pushed to the ___________.

• east
• west
• south
• up

Multiple Choice

A bug hits a windshield. The force of the bug on the windshield is _______ the force of the windshield on the bug.

• less than
• twice as much
• equal to
• greater than