Show:
Forces
Newton's Laws
Simple Machines
Vocabulary
Miscellaneous
100
What does every force have?
Strength and Direction
100
A football will not move until a player throws it. This is an example of which of Newton's three laws?
Newton's First Law
100
A wheelbarrow is an example of what type of simple machine?
A lever
100
What is uniform motion?
Motion where speed and direction do not change.
100
When you ride in a roller coaster, what makes you rise out of your seat?
Inertia
200
What type of force requires two pieces of matter to touch?
Contact Force
200
If air is let out of a balloon quickly, the air pushes down and balloon goes up. This is an example of which of Newton's three laws?
Newton's Third Law
200
A crane is an example of what type of simple machine?
Pulley
200
What is inertia?
The tendency for objects to resist any change in motion.
200
What are three ways an object can accelerate?
1. Speed up 2. Slow down 3. Change direction
300
What type of force acts at a distance?
A Non-contact Force
300
Pulling a child in a wagon requires less force than pulling an adult in the same wagon. This is an example of which of Newton's three laws?
Newton's Second Law
300
A knife is an example of what type of simple machine?
Wedge
300
What force results when two materials rub against each other?
Friction
300
Suppose you have a bowling ball and a tennis ball. Which ball requires more force to accelerate?
Bowling ball
400
In which direction does gravity pull you?
Gravity pulls you toward the center of Earth.
400
When an airplane takes off, you feel pushed back into your seat. This is an example of which of Newton's three laws?
Newton's First Law
400
A jar lid is an example of what type of simple machine?
A screw
400
What is gravity?
The force of attraction between two objects.
400
How does a simple machine help you do work?
Simple machines make work easier, but they do not reduce the amount of work required.
500
How do electric and magnetic forces act on objects?
They either push or pull on objects from a distance.
500
A fireman turns on his hose and is knocked backwards. This is an example of which of Newton's three laws?
Newton's Third Law
500
A screwdriver is an example of what type of simple machine?
A wheel and axle
500
What is a fixed point or support called?
A fulcrum
500
What word tells us that motion does not change?
Uniform