Forces
This is defined as the power that makes things happen or change; it's the "go" button for everything around you.
What is energy?
These are the kind of forces that happen only when things touch or make direct contact with each other.
What are contact forces?
Forces can cause an object to change three main things: its movement, its size, and this.
What is shape?
This machine has a pivot point called a "fulcrum" and works like a see-saw.
What is a lever?
What are the two special ends of a magnet called?
The North Pole and the South Pole.
This is a push or a pull on an object.
What is a force?
This force is the resistance one object has when in contact with another surface, like ice versus pavement.
What is friction?
When a force causes a moving bicycle to slow down or stop, it is causing a change in this.
What is speed?
This simple machine is a slope or ramp that makes it easier to lift heavy things by spreading the effort over a longer distance.
What is an inclined plane?
What happens when you bring the North Pole of one magnet close to the South Pole of another?
They attract each other.
This specific type of force occurs when you move something away from you, like a swing at a park.
What is a push?
This force is exerted by pulling on a string, rope, or anything else that is stretchy until it becomes tight.
What is tension?
This term describes the magnitude of a force, telling us how "strong" or "weak" a push or pull is.
What is force strength?
A cart is a common everyday example of this simple machine.
What is a wheel and axle?
What force pulls everything toward the Earth without touching it?
Gravity.
This type of force occurs when you move something toward you, like a wagon.
What is a pull?
This force "squishes" things together, making them shorter or smaller.
What is compression?
This is what a baseball hitter or tennis player is doing when they use force to send a ball in a new path.
What is changing direction?
This machine is made of two inclined planes stuck together and is used for splitting, cutting, or prying.
What is a wedge?
What is a non-contact force?
A force that can act on objects without touching them, such as gravity or magnetism.
Without this being applied, an object will not change its current state.
What is a force?
This type of force is made by a compressed or stretched spring or elastic material, such as on a trampoline.
What is spring force (or elastic force)?
When you blow up a balloon, you are using force to change both its size and this.
What is shape?
This machine uses a wheel with a rope to change the direction of a force, making it easier to lift heavy objects vertically.
What is a pulley?
This is the invisible area around a magnet where its magnetic force can be felt.
What is a magnetic field?