Vocabulary
Newton's First Law
Newton's Second Law
Compare & Contrast
Net force
100

What is an unbalanced force?

a force that allows and object to change it's motion in a specific direction.

100
Finish the phrase: "An object in motion stays in motion and...
What is "an object at rest stays at rest unless acted on by an unbalanced force"?
100
the formula for Newton's 2nd Law
What is "F=ma"?
100
A tennis ball is served, the tennis player on the other side of the net swings at the ball but misses. This law explains why the ball stays in motion until it hits the fence.
What is "Newton's 1st Law"?
100
When forces are going in the opposite directions, you must add or subtract?

Subtract.

200

Define gravity

What is "a noncontact force that pulls two objects toward one another, generally downward"?

200
In the following example, what is the unbalanced force: A car is driving down the street, but comes to an abrupt stop when it hits a tree.
What is "the tree"?
200

Finish Newton's 2nd Law: Acceleration occurs when...

What is "a force acts on a mass"?

200
Which of Newton's Laws take force into consideration?
What is "all of them"?
200
All forces are measured in what units?

Newtons

300
a push or pull
What is "force"?
300
Draw an example of Newton's first law.
(show dry-erase board)
300

If a force of 10N is pulling left and a force of 17N is pulling right. What is the net force and the direction of the force?

7N right

300

Ms. Mines is going down the sidewalk on her skateboard; Ms. Hughes decides to get on too. What will Ms. Mines have to do to keep the skateboard moving at the same speed?

What is "push with more force"?

300

Four kids are on a see-saw. The left side is higher than the right side. What does this mean?

The forces are unbalanced and the left side has more force than the right side.

400

a change in a moving object's speed or direction

What is "acceleration"?

400
Another name for Newton's First Law.
What is "law of inertia"?
400

Provide an example of Newton's 2nd Law.

(show dry-erase board)

400

Safety researchers are simulating a head on collision using crash test dummies to represent what happens to people. One of the dummies doesn't have a seat belt on. What happens to the crash test dummy without the seatbelt when the car hits the concrete barrier and why?

What is "the dummy flies out the window because an object in motion wants to stay in motion."? This is called inertia

400

24N are pushing upward, 24N are pushing downward. Calculate the net force and the direction of the force. 

0N with no motion.

500

Define inertia

What is "an object's tendency to resist any change in its motion"? (Keep doing what it's already doing).

500

A book on a desk will stay at rest until

An unbalanced force acts on it to make it go in motion.

500

Which would have a greater acceleration, a small car or a large car, if the same force is applied?

What is "a small car"?

500

Why does a marble on the floor slow down and eventually stop rolling if Newton's 1st Law says an object in motion stays in motion?

What is "friction"?

500

8N left, 5N right, 9N left, 7N right. What is the net force and the direction of the force?

7N, left.

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