Vocab Basics
What is a push or pull that can change an object's motion?
Force
According to Newton's First Law, what will an object at rest do?
Stay at rest
If you push an empty shopping cart and a full shopping cart with the same force, which one accelerates faster?
Empty Cart
According to Newton's Third Law, what comes with every action?
equal and opposite reaction
Which law shows how much motion changes when a force is applied?
2nd
What is the tendency of an object to resist changes in its motion?
What safety device provides the unbalanced force to stop you safely when a car stops?
Seatbelt
If you want to accelerate a heavy object faster, what do you need to do?
Add more force
Are the action and reaction forces in Newton's Third Law equal in size?
yes
Which law explains that motion does not change on its own?
1st
What is the change in position of an object over time?
Motion
What does an object in motion need to change its direction?
Two objects have the same mass. If you apply twice as much force to one object, how much faster will it accelerate compared to the other?
Twice as fast
When you jump off a canoe, the canoe moves backward. Why
Newton's Third Law (action and reaction)
A book sits on a table and does not move. Which law explains why?
1st
What is a state where all forces acting on an object are balanced?
Equilibrium
When a car suddenly stops, why does your body continue moving forward?
Inertia
In Newton's Second Law formula, what does the "m" represent?
mass
When you walk, your foot pushes backward on the ground. What does the ground do?
Pushes with same force
You throw a ball to a friend. The ball pushes forward through the air, and the air pushes back on the ball. Which law explains this?
3rd law
What is the overall force acting on an object after all forces are combined?
Net Force
If there were no friction or forces in space, what would happen to a moving spaceship?
It would go on forever
What is the formula for Newton's Second Law?
f=m x a
When a rocket launches, hot gases push downward out of the rocket. According to Newton's Third Law, what pushes the rocket upward?
= and opposite reaction force
A heavy truck and a light bicycle are both pushed with the same force. Using Newton's Second Law, explain which one accelerates more and why.
Bicycle