Question | Answer |
What is speed? | A measure of how fast an object moves |
What is friction? | A force that acts against motion when 2 surfaces are touching |
What is an inclined plane? | A simple machine made of a flat surface that is higher at one end. It is used to move objects to a higher or lower place. |
What is inertia? | It is what makes an object resist a change in motion |
What is weight? | A force of gravity on an object |
What is a fulcrum? | The point where a lever rocks back and forth |
What is work? | A force that acts on an object and moves it over a distance. |
What is pressure? | A measure of a force pushing on an area |
What is gravity? | A force of an object pulling on another object that isn't attached |
What is a newton? | A metric unit used to measure pushes and pulls |
What is a pull? | A force needed to open a door |
What is a push? | A force needed to close a refrigerator door |
What is a compound machine? | A compound machine is made up of a least 2 simple machines. |
When you throw a ball,what three things does it have? | Position, speed and motion |
How do you describe the position of an object? | You compare its position to the position of another object |
How do you prove that an object is in motion? | To prove it is in motion, you need to record its position at different times. |
How does a lever work? | A lever has an arm that turns on a fulcrum.It is used to raise or lower an object. |
When will an object move? | An object begins to move only when forces become unbalanced. |
Name five simple machines. | Lever, Pulley, Inclined Plane, Wheel and Axle, Wedge and Screw. |
What force occurs when you are riding your bike? | When you are riding your bike, friction occurs between the bicycle wheel and the road because the wheel and the road touch. |
What is a compound machine? | A compound machine is made up of a least 2 simple machines. |
Name five simple machines. | Lever, Pulley, Inclined Plane, Wheel and Axle, Wedge and Screw. |
What is a machine? | A tool used to change a force. |
What is a simple machine? | A machine that has few or no moving parts. |
What is an example of work? | An example is a man picking up a book. |
How does a lever work? | A lever has an arm that turns on a fulcrum.It is used to raise or lower an object. |
What is a wedge? | A wedge is a solid triangular piece of wood or metal that can be used to separate, split or lift objects. |
What is a machine? | A tool used to change a force. |
What is a screw? | A simple machine that is an inclined plane that winds around into a spiral. |
what is an example of an inclined plane? | An example is a ramp. |
What is a wheel and axle? | It is a simple machine with a wheel attached to a bar called an axle. Turning the wheel turns the axle. |
What is a pulley? | A simple machine that has a wheel and a rope or a cable. A pulley changes the direction of the force. |
What is motion? | What happens when something changes position |