Term
| What are some examples of non-contact forces? |
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Definition
| gravity, magnetism, electric force |
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Term
| How are weight and mass similar? |
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Definition
| Weight is proportional to mass |
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Term
| How are weight and mass different? |
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Definition
Weight- gravitational force exerted on an object
Mass- amount of matter in an object |
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Term
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Definition
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Term
| ________ is a force that resists the motion of two surfaces that are touching. |
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Definition
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Term
| What is a circular motion? |
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Definition
| Any motion moving along a curved path. |
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Term
| What force or motion is involved with the Moon orbiting around Earth? |
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Definition
| Centripetal force acts on the Moon orbiting around Earth because of gravity. |
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Term
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Definition
| If the net force on an object is zero, the motion of the object does not change. |
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Term
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Definition
| The acceleration of an object is equal to the net force acting on the object divided by the object's mass. |
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Term
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Definition
When one object exerts a force on a second object, the second object exerts an equal froce in the opposite direction onto the first object.
(for every action, there is an equal and opposite reaction) |
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Term
| What is the equation for momentum? |
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Definition
momentum= mass x velocity
p= m x v |
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Term
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Definition
| Momentum- a measure of how hard it is to stop a moving object |
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Term
| What are balanced forces? |
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Definition
| Forces acting on an object that combine and form a net force of zero (which means they don't change the motion of the object). |
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Term
| What are unbalanced forces? |
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Definition
| Forces acting on an object that combine and form a net force that is NOT zero (they change the motion of the object). |
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Term
| What is the force that must be overcome to start an object moving? |
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Definition
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Term
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Definition
| Air resistance- fluid friction between a surface and air |
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Term
| What is the unit for force? |
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Definition
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Term
| ________ is a push or pull on an object. |
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Definition
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Term
| What is the formula for force? |
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Definition
| Force= mass x acceleration |
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Term
| Can a force at any angle perform work? |
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Definition
| Any angle of force can perform work EXCEPT a vertical (900) angle. |
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Term
| What is the unit for work? |
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Definition
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Term
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Definition
| Power- the rate at which work is done |
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Term
You can get more work from a machine than is put in.
True or False |
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Definition
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Term
| What is the unit for power? |
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Definition
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Term
| What is the standard unit for distance? |
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Definition
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Term
| _________ is the amount of force per unit area applied to an objects surface. |
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Definition
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Term
| What is the formula for pressure? |
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Definition
| pressure= force divided by area |
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Term
| What happens to pressure as depth increases? |
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Definition
| As depth increases so does pressure. |
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