Download Chapter 12 Study Guide

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Chapter 12: Force and Newton’s Laws Study Guide
Define the following terms:
Force
Balanced Force
Unbalanced Force
Net Force
Friction
Inertia
Acceleration
Gravity
Action and Reaction
Weight
Mass
1. Write out each of Newton’s three laws and explain an example of each.
Newton’s First Law states:
Newton’s Second Law states:
Newton’s Third Law states:
2. Explain whether an object can be moving if the net force acting on the object is zero.
3. Explain whether the forces involved are balanced or unbalanced:
a. You throw a ball to the floor.
b. Your car slows down.
c. You and your friend push one another and neither of you move.
4. Name two contributions to science made by Isaac Newton.
5. Explain how your body moving forward in a car when the driver steps on the brakes relates to
Newton’s 1st Law.
6. Explain how circular motion causes riders to stay in their seats as they ride a looping roller coaster.
7. Explain why you move forward and a boat moves backward when you jump from a boat to a pier.
8. Describe the action and reaction forces when a hammer hits a nail.
WRITE THE FORMULA(S) FOR FINDING FORCE/ACCELERATION USING THE 2nd LAW:
Solve the following using Newton’s second law (SHOW YOUR WORK!!):
9. A car has a mass of 1,500kg. If the car has an acceleration of 2.0 m/s2, what is the net force acting on
the car?
10. During a softball game, a soft ball is struck by a bat and has an acceleration of 1,500m/s2. If the net
force exerted on the softball by the bat is 300 N, what is the softball’s mass?
11. A person standing in a canoe exerts a force of 700 N to throw an anchor over the side. Find the
acceleration of the canoe if the total mass of the canoe and the person is 100 kg.