Force
This or That: A heavy door takes a big push to open it.
Is this a strong or weak force
Forces can have strength. This is a strong force!
A rubber band is an example of this force
Elastic Force
What are non-contact forces
Are forces that act on an object without physically touching it.
This simple machine is also known as a ramp
Inclined plane
What simple machine helps you roll heavy objects?
wheel and axle
________ are pushes and pulls that make things move or stop moving.
Forces
This type of force slows down objects or makes them harder to move.
Hint: It is caused by two surfaces rubbing against each other.
Friction
This force pulls is responsible for keeping us grounded on Earth.
Gravity
True or False: Forces can change the shape of an object?
True
Name 4 types of forces
- Squeeze
- Stretch
- Pull
- Push
This force occurs when force given by a person or an object touching another object.
Applied
________ attracts and repels objects with magnetic properties
Magnetic force
True or false: Using a wheel makes less friction
True
What is a simple machine?
A machine is anything that makes a force stronger
Simple Machines are basic machines that allow us to make force.
________ is the power that makes things happen or change. It's what lets things move, work, and do stuff.
Energy
___________ is caused by pulling on a string or rope that is connected to an object.
Tension Force
_______ is a non-contact force that can attract or repel object with electric charges.
Electric force
- Wheel and axle
- Pulley
- Lever
- Incline Plane
- Screw
- Wedge
This or That: A ________ ramp makes the load feel lighter.
Long or Shorter
Longer
A longer length will create a gentle slope that needs less force to push. The problem is that you just need to push the object further.
How does squeezing change the shape of an object?
Force can change the direction of motion, shape, state, direction, and speed of an object.
It makes it smaller or flatter
These are the 4 types of contact forces
Friction Force
Tension Force
Applied Force
Elastic Force
If you shuffle your feet on the carpet and then touch a metal doorknob, you will experience a small shock due to what non-contact force?
Electrostatic force
What is an example of a class 2 lever?
answers may vary - wheel barrow
Class 2 lever: the load is between the fulcrum and the effort
An object the is not moving will _____ _____ until a force makes it move, and an object that is _______ will _____ _____ until a force stops it.
(Hint: Newton's First Law)
1. stay still
2. moving
3. keep moving