force. force a push or pull one thing exerts on another
TRANSCRIPT
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FORCE
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Force
A push
or pull
one thing exerts on another
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What do you know?(Examples, pictures, definitions, experiences)
Normal Force Weight Applied Force
Tension Friction Air resistance
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Which of the following would be a unit that measures force?
1. kilograms
2. ounces
3. pounds
4. meters per second
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Units of force
• English system
– Pounds (lbs.)
• Metric system
– Newtons (N)
Quarter pounder
0.22 pounds = 1 Newton
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What force is acting up on the skydivers?
1. Normal force
2. Weight
3. Tension
4. Air resistance
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What force is acting down on the skydivers?
1. Normal force
2. Weight
3. Tension
4. Friction
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What are the two forces acting on these skydivers?
Weight (force because of gravity)
Air resistance
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What is the name of the upward force that the table is supplying to
the cell phone pictured below?1. Weight
2. Friction
3. Tension
4. Normal
5. Air resistance
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What are the two forces acting on this cell phone?
Weight (force because of gravity)
Normal Force
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What are the other two forces acting on the truck?
Friction Applied Force
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What is the name of the force drawn
in the picture?
1 2 3 4 5 6
17% 17% 17%17%17%17%
1. Air resistance
2. Weight
3. Tension
4. Friction
5. Normal Force
6. Applied Force
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When I hit the brakes in a car, the car comes to a stop because _______ acts
between the tires and the road.
1 2 3 4 5 6
17% 17% 17%17%17%17%
1. Air resistance
2. Weight
3. Tension
4. Friction
5. Normal Force
6. Applied Force
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Balanced Forces
When forces are equal in size and opposite in direction.
5 N
5 N
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Unbalanced Forces
Forces that are not equal in size OR
45 N 15 N
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Unbalanced Forces
Forces that are not opposite in direction.
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Net Force
The overall force acting on an object.
Who’s winning and by how much?
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Net Force
Net force =
12 N
4 N
12 N
20 N
16 N
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What is the magnitude of the net force acting on the object?
20 N
10 N
12 N
10 N
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What is the direction of the net force acting on the object?
20 N
10 N
12 N
10 N
1. up
2. down
3. left
4. right
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Force vectorsWhen adding vectors, you can move them, but you can’t change the size or direction
4 N
3 N
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Given the following picture, how would you describe the weight and
normal force?
1 2
50%50%
1. Balanced
2. Unbalanced
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Examples in SMART