Calculating Net Force
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If 2 forces are acting on an object in the same direction, you {BLANK} them to find the net force.
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What is a contact force?
A force that acts on an object through direct contact.
What is the reaction force when you push a wall?
The wall pushes back
Give an example of friction in real life.
Rubbing your hands together, etc.
If a box is pushed with 30N to the right and 10N to the left, what is the net force and what direction is it moving?
20N to the right
Give an example of how applied force was used in our Forces Field Day
Baseball, volleyball, etc
If you jump off a boat, what happens to the boat?
The boat moves in the opposite direction.
Describe a situation where gravity is acting on an object.
An apple falling from a tree., etc.
Calculate the net force and direction: 50N to the left and 20N to the right.
30N to the left
Name two types of noncontact forces
Gravity, Magnetism
What is Newton's 3rd Law referring to when it says "equal and opposite"?
Equal: magnitude of forces
Opposite: direction of forces
Describe a real-world example of applied force.
Pushing a shopping cart in a store, etc.
What is the net force of an object with balanced forces?
O N
What is a normal force?
The support force exerted on an object that touches another stable object.
What is Newton's 3rd Law?
For every action, there is an equal and opposite reaction.
How can you see Newton's 3rd law when a skateboarder pushes off the ground?
The skateboard moves in the opposite direction of the push.
How would you find the net force if two forces are acting in opposite directions and onto the same object?
Subtract the smaller force from the larger force
What is an example of "fluid friction"
Air resistance, water
Explain action and reaction in your own words.
Action - initial force acting on an object
Reaction - the force the object returns to the first object
Explain how forces are involved when you ride a bicycle. (applied, friction, normal, gravity)
You apply force to the pedals, and the bike moves forward due to the reaction force.