Vocabulary
a push or a pull
force
(T or F) Mass and weight are the same thing.
False (mass is about the size an object takes up, while weight refers to the force gravity pushes down on something)
Which law of motion tells us that the harder you kick a ball, the father it will go?
Newton's 2nd Law
Unbalanced Force
gravity
pulls things together
(T or F) In science, acceleration means any change in motion.
True (accelereation is any change in speed or direction in motion)
Which law of motion explains why it is important to wear seatbelts?
Newton's 1st Law
If I had a Force of 20 N and a mass of 4 units, what would be my acceleration?
5 units
two teams are playing tug-of-war, but no one is moving
balanced forces
(T or F) Ice has more friction than pavement.
False (ice has much less friction than pavement, that is why it is so slippery)
What unit do we use to measure force?
Newtons
Who was the scientists that discovered the 3 laws of motion?
Isaac Newton
friction
the breaks in your bike rub against the tire to slow down
(T or F) Isaac Newton's 2nd Law of Motion is: an object will stay still or moving until a force acts on it
False (the greater the mass an object has, the more force you'll need to create acceleration)
Every action has an equal AND opposite reaction
Why does a ball travel farther when you kick it hard than when you just tap it with your foot? (use the word force in your answer)
When you kick the ball hard, you are applying more force than with just a tap.
inertia (define & give an example)
objects try and resist a change in motion (your body moves forward when someone slams on the breaks)
(T or F) This is Newton's 2nd Law Equation:
(F= mass x acceleartion)
True
What is the difference between Newton's 1st Law and 2nd Law of Motion?
Newton's 1st law describes how stuff keeps doing what it's doing unless pushed - Newton's 2nd law describes how much that stuff changes when you do push it
There is less friction on the ice than on pavement. With less friction, you have more chances to slip.