Definitions
What is the 1st Law?
Objects at rest tend to stay at rest. Objects in motion tend to stay in motion.
Who came up with the laws of motion?
Sir. Isaac Newton.
What object would have more inertia.
What force pushes down on an object?
Gravity.
When you jump what force pushes you back down?
Gravity.
What is inertia?
An objects resistance to change.
How do some people think Newton discovered gravity?
An apple falling on his head.
Provide an example of inertia.
example must include an object not wanting to change direction.
What force rubs against an object to stop it from moving?
Friction.
When astronauts are in space why do they float.
There is no gravity.
What is a balanced force?
Forces that are equal in size and opposite in direction acting on an object.
What book did Newton publish his three laws of motion?
His book of mathematic principles of natural philosophy.
Give an example of an object with lots of inertia.
ex. mountain or school.
Give an example of an object with balanced forces.
Why are heavier objects harder to move?
They have more inertia.
What is an unbalanced force?
Forces that are not the same size acting on an object.
What years was Sir. Issac Newton alive?
1643-1727.
Give an example of an object with very little inertia.
ex. feather or pencil.
If objects tend to stay in motion why do they eventually stop?
Friction and gravity.
What happens when you kick a soccer ball? Explain using unbalanced force.
When you kick a soccer ball you apply an unbalanced force causing the soccer ball to move.
What is mass?
Mass is the measure of how much matter is in an object.
Who gave Newton the inspiration for the three laws of motion?
Galileo.
In the egg experiment why did the egg fall in the cup?
Because the egg had more inertia than the plate and paper towel roll.
Give an example of unbalanced forces.
ex. tug a war.
Why were seat belts put into cars.
With out them when you stop suddenly inertia would cause you to fly out of your seat.