The law explained
What is Newton's First Law of Motion?
An object at rest stays at rest, and an object in motion stays in motion with the same speed and direction unless acted upon by an unbalanced force.
The type of forces acting on a book resting motionless on a table.
net force of zero
What stops your body from lurching forward when a car suddenly stops?
Your seat belt
The relationship between an objects mass and its inertia.
the greater an object's mass, the greater its inertia.
This is the other name for Newton's First Law of Motion.
Law of Inertia
The kind of force that causes an object to accelerate or change its direction
An unbalanced force, also known as a net force
A magician pulling a tablecloth from under a full table setting without disturbing the dishes is an example of this concept.
inertia, also known as Newton's First Law of Motion
This object has more inertia : a bowling ball or a tennis ball .
The bowling ball
What is inertia?
This property of matter is a measure of an object's resistance to a change in its state of motion.
The type of force at play in a game of tug-of-war where the rope is not moving
the forces are balanced forces.
When you stir a cup of coffee and then let go of the spoon, it continues to swirl because of this
inertia
A smaller force is needed to move a bicycle than a car because the bicycle has less of this.
A smaller force is needed to move a bicycle than a car because the bicycle has less of this.
What is a constant velocity or at rest?
The state of motion an object will be in if all forces acting on it are balanced
In a game of tug or war ,if one team pulls with 200n of force and the other with 150n,this is the net force.
50n
A satellite orbiting the Earth continues its motion forward, but gravity acts as this kind of force to keep it in orbit.
Gravity acts as a centripetal force to keep a satellite in orbit
Pushing on a heavy box versus pushing on an empty box demonstrates that more massive objects require a larger force to change their state of motion due to this.
Pushing a heavy box versus an empty one demonstrates that more massive objects require a larger force to change their state of motion due to inertia.
What is the net force?
The overall force acting on an object when all individual forces are combined.
the two key factors ,in addition to magnitude that must be considered when determining if a force is balanced or unbalanced.
direction and the net force
A hockey puck sliding across the ice slows down and stops due to this specific unbalanced force
The unbalanced force is friction
If a golf ball and a bowling ball are both rolling at the same speed, the bowling ball is harder to stop because it has more of this.
The bowling ball is harder to stop because it has more inertia