Revision: Motion

The law of inertia (a.k.a. Newton's First Law) states that an object

• At rest will remain at rest unless acted upon by an outside force

• Will continue moving at the same velocity unless an outside force acts on it

• Will continue moving in a straight line unless an outside force acts on it

• all of the above

A tennis ball and a solid steel ball the same size are dropped at the same time. In the absence of air resistance, which ball will reach the ground first?

• The tennis ball

• The steel ball

• They reach at the same time

• Not enough information is given

According to Aristotle, If the force acting on a cart is doubled, what happens to the cart’s velocity?

• It is quadrupled

• It is doubled

• It is halved

• It is quartered

Which of Newton's 3 Laws is illustrated in the meme shown?

• none of the above

• 1st law

• 2nd law

• 3rd law

An unfortunate bug splatters against the windshield of a moving car. Compared to the FORCE of the car on the bug, the FORCE of the bug on the car is

• Larger

• Smaller

• The same

  
  

• Need more information to say

An unfortunate bug splatters against the windshield of a moving car. Compared to the ACCELERATION of the car, the ACCELERATION of the bug is

• Larger

• Smaller

• The same

• need more information to say

A greater applied force is required to move an object with a greater mass than one with a smaller mass.

• true

• false

How does Newton’s third law explain how a rocket takes off?

• The rocket’s acceleration is positive, while the gasses acceleration is negative but the direction is the same

• The hot gasses move in one direction, while the rocket moves in the opposite direction but with equal force.

• The rocket is at rest until ignition.

If you exert a net force of 8 N on a 2-kg object, what will its acceleration be?

• 
  2 m/s²

• 16 m/s²

• 
  4 m/s²

• 10 m/s²

If two forces are in the same direction, they cancel each other out. True or false?

• true

• 
  false