#11 - Associated with Inertia and #12 - Law of action-reaction
Law 1 and Law 3
#22 - A kid applies a force of 27 N to a 9 kg wagon. How fast does it accelerate?
A=F/M so A = 27/9 = 3 m/s2
#17 - Slowing down at a stop light
Unbalanced Forces
#16 - Identify the correct units for each of the listed values
m/s2 - Acceleration; m/s + direction - Velocity; Newtons - Force; Kilograms - Mass
#27 - Forces come in ___________
Pairs
#10 - States that force is dependent on the mass and acceleration of an object
Law 2
#9 - Explains why when you bump into something you fall backwards
Law 3
#29 - Your shoulder is pushed back after shooting a shotgun
Law 3
#14 - You are waiting in line to use the diving board at your local pool. While watching people dive into the pool, you realize that using a diving board to spring into the air is a good example of which law?
Law 3
Vocab #6 - A force that opposes an object and slows it down
Friction
#29 - A magician pulls a tablecloth out from under dishes and the glasses don't fall
Law 1
Vocab #4 - The tendency of an object to resist any change in motion
Inertia
#18 - When forces act in the same direction you _______ and when forces act in different directions you _______
--> --> or <-- <-- = Add; --> <-- or <-- --> = Subtract
#17 - An object at rest - Net force of 0 Newtons
Balanced Forces
#23 - A bowler rolls a 5 kg bowling ball down a magical, frictionless bowling alley. The ball accelerates at a rate of 2 m/s2. What force did the bowler apply?
F=MA so F=5x2 = 10 Newtons
#25 + 26 - If you increase force the acceleration will _________. If you increase mass the acceleration will __________.
Increase Force - Increase Acceleration, Increase Mass - Decease Acceleration
#29 - A soccer ball accelerates faster than a bowling ball when the same amount of force is applied
Law 2
#29- A student walking quickly, carrying an orange on his lunch stray, stops suddenly and the orange falls forward
Law 1
#29 - You paddle your canoe; your oar goes backward, but the boat goes forward
Law 3
#15 - When Jane drive to work, she always places her purse on the passenger’s seat. By the time she gets to work, her purse has fallen on the floor in front of the passenger seat. This displays which law?
Law 1
#20 - What is the net force needed to push a cart to the right with 5 N of force and a friend pushes the cart to the left with 5 N of force? Will the cart accelerate?
0 N - no it will not accelerate
#19 Calculate the net force for both A and B
A = 4 N up and B = 0 N
#21 - If 2 people each push on a box with 20 N to the right, what will the net force be?
40 N to the right
#28 - You dribble a basketball while walking on a court. List at least 2 pairs of action-reactoin pairs.
Ball - Floor; Ball - Hand; Fee - Floor
Vocab #3 - When forces are equal and opposite
Balanced
#17 - Pushing a box 10 meters
Unbalanced Forces
#8 States that an object at rest stays at rest and an object in motion stays in motion unless acted on by an unbalanced force
Law 1
Vocab #2 - Combination of all the forces acting on an object
Net Force
#17 - Traveling at a constant velocity
Balanced Forces
Vocab #7 - The amount of matter in an object
Mass
#17 - A satellite orbiting Earth
Unbalanced Forces
Vocab #5 - A push or a pull
Force
#13 - Inertia depends on what?
Mass
#29 - You bump into a wall and fall backwards
Law 3
#29 - A speed skater goes faster as they push harder with their legs
Law 2
Vocab #1 - Change in an object's velocity
Acceleration
#24 - Steve the fish-thrower throws a fish into the ocean with a force of 45 N. The fish accelerates at a rate of 3m/s2. What is the mass of the fish?
M=F/A so M=45/3 = 15 kg
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