Newtons first law of motion

States that an object at rest will stay at rest unless acted upon by a nonzero net force. An object moving at a constant velocity will continue moving at a constant velocity unless acted upon by a nonzero net force.

There are two backpacks. One has one pencil inside, while the other has 5 Harry Potter books inside. Which one is harder to move and has more inertia?

The fuller backpack is harder to move than the one with the pencil because it has more mass and therefore more inertia.

Newtons second law of motion

States that an object's acceleration depends on its mass and on the net force acting on it

An increase in force causes an ( ) in acceleration.

increase. To increase the acceleration of an object, you can increase the force you use to pull it. You can pull harder.

An increase in mass causes a ( ) in acceleration

decrease. It also means that a decrease in mass causes an increase in acceleration. So to increase the acceleration of an object, you can decrease its mass.

Newtons third law of motion

States that if one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.

Another way to state newtons third law

is that for every action there is an equal but opposite reaction

Action and reaction forces do not cancel out

because they act on different objects

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science test 3/2

studystack for science

Question	Answer
2nd law of motion (equation)	F=M x A
Newtons first law of motion	States that an object at rest will stay at rest unless acted upon by a nonzero net force. An object moving at a constant velocity will continue moving at a constant velocity unless acted upon by a nonzero net force.
Inertia	Resistance to change in motion
Newtons first law of motion is also called?	The law of inertia
The greater the ( ) of an object, the greater its inertia, and the greater force required to change its motion	mass
There are two backpacks. One has one pencil inside, while the other has 5 Harry Potter books inside. Which one is harder to move and has more inertia?	The fuller backpack is harder to move than the one with the pencil because it has more mass and therefore more inertia.
Newtons second law of motion	States that an object's acceleration depends on its mass and on the net force acting on it
Acceleration formula	Net force/ Mass
Force formula	A x M
Mass formula	Net force/acceleration
unit of acceleration	m/s^2
unit of force	N which stands for Newton
unit of mass	kg
An increase in force causes an ( ) in acceleration.	increase. To increase the acceleration of an object, you can increase the force you use to pull it. You can pull harder.
An increase in mass causes a ( ) in acceleration	decrease. It also means that a decrease in mass causes an increase in acceleration. So to increase the acceleration of an object, you can decrease its mass.
Newtons third law of motion	States that if one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.
Another way to state newtons third law	is that for every action there is an equal but opposite reaction
Action and reaction forces do not cancel out	because they act on different objects
the action and reaction forces are (equal to, less than, or greater than) each other	equal to
The amount of inertia an object has depends on its ( )	mass

Created by: emilybinderiya

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