SFSc4#B2
Terms
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- You can do work because you have potential _________.
- energy
- wheel and axle
- a simple machine made of a wheel attached to a rod
- inertia
- inertia is the tendency of a moving object to stay in motion or a resting object to stay at rest
- work
- the result of a force moving an object
- compound machine
- a machine made of two or more simple machines
- potential energy
- energy that an object has because of position
- chemical energy
- energy that comes from a chemical change
- What are two effects that forces can have on motion?
- start moving, speed up, slow down, stop, or change direction
- The tendency of an object to stay in motion until a force stops it is called_________.
- inertia
- How is a ball tossed in the air like a roller coaster car rolling down a track?
- Gravity is acting on both objects.
- gravity
- gravity is the force that pulls two objects toward one another because of their mass
- inclined plane
- is a simple machine with a flat surface and one end higher than the other
- When you apply the brakes on your bike, the brakes rub against the wheel and cause_______.
- friction
- A roller coaster car goes up and down because it is moved by a
- force.
- simple machine
- a machine of one or two parts
- The force of------is what pulls a roller coaster car to the earth.
- gravity
- Force
- force is a push or pull on an object that can cause it to change motion
- mechanical energy
- the kind of energy an object has because it can move or is moving
- screw
- a simple machine consisting of an inclined plane wrapped around a rod
- Describe how friction affects the motion of an object.
- Friction rubs - this rubbing changes the energy level- this will cause the object to slow down or stop.
- energy
- the ability to do work
- complex machine
- a machine made of many simple and compound machines
- pulley
- a simple machine that uses a rope and a wheel
- friction
- a force that slows the motion of moving objects
- kinetic energy
- is the energy of motion
- electrical energy
- energy that comes from the flow of electricity
- wedge
- a simple machine that has slanted sides