1. Unit 2 Test Review

2. Newton’s 3 Laws
Law
Action 1
A person in a canoe moves the paddle backwards in the water to move the boat forward 2
It takes more force to move a 500 kg object with the same acceleration of a 50kg object

3. The force it takes to move a 4kg object at 20m/s/s is 40N
Newton’s 3 Laws
Law
Action 3
A baseball hits the glove and the glove applies force on the ball to stop it. 4
The force it takes to move a 4kg object at 20m/s/s is 40N 5
A force of 50N will move a 50kg object faster than it would a 100kg object.

4. Balanced vs Unbalanced
If all forces are balanced, what two types of movements can an object have?
If an unbalanced force is applied, what type of motion will can object have?
A hockey puck is set in motion across a frozen pond. If friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is what?

5. Balanced vs Unbalanced
An object that weighs 10 N falls while encountering 10 N of air resistance. What is true about the motion of the object?
A block is dragged at constant speed in a straight line path across a level surface by a horizontal force of 6 N. What is the force of friction between the block and the surface?

6. Balanced vs. Unbalanced
The cylinder to the right is not moving and is applying a force of 150N downwards. What type of force is being applied on it to keep it in place?

7. Balanced vs. Unbalanced
Describe the Forces applied and the type of motion for each pencil picture (A, B, C, D).

8. Which value never changes? Mass or Weight? How do we calculate Weight?
Weight vs. Mass
Which value never changes? Mass or Weight?
How do we calculate Weight?
How do we find mass when given Weight in Newtons?
How does weight on the moon compare to weight on Earth?

9. What type of friction does Air Resistance fall into?
What type of friction would a ball have?
What type of friction would an unmoving car have before you move it?
What type of friction does an eraser have as it moves across the paper?
What direction does friction act?

10. Equations What is the equation for finding Force?
What is the equation for finding Weight?
What equation would I use for finding mass when given acceleration and Force?
What equation would I use for finding acceleration when given Force and mass?
What is the equation for finding Momentum?
What is the unit for Force?
What is the unit for Mass?
What is the unit for Acceleration?
What is the unit for Momentum?

11. Math Practice
A 3kg box being pushed at an acceleration of 2m/s/s, how much force is being used to push the box?
A box is pushed with a force of 20N and accelerates at a rate of 5 m/s/s. What is it’s mass?
A bag of groceries has a mass of 10 kilograms. What is the weight of the bag?

12. Math Practice
What happens to the mass of a person when they go from the Earth to the Moon?
What is the mass of a pet turtle that weighs 10 N?
Calculate the momentum of a 15 kg ball that is moving toward home plate at a velocity of 60 m/s.
A 60kg man is in free fall without air resistance. What is his acceleration?

13. Force Diagrams
Draw a force diagram showing 80N of upwards force acting on an object falling with a force of 150N.
Draw a force diagram of an object that is being pushed to the right but is not moving.
Draw a force diagram of a can sitting still on a table.
Find the netforce of the objects to the right ---->