Forces
What unit is used to measure force?
Newtons
Newton's 1st Law is also known as the _____
Law of Inertia?
The force for attraction between objects
Gravity
Pulling a table cloth from a table & not disturbing the items on top is an example of which law of motion?
First
A car and a train are going the same speed. The car is easier to stop because _____
It has less mass
This type of force causes an object to change its motion
Unbalanced forces
What is the mass of an object that has an acceleration of 2.5m/s^2 that is pushed by a force of 140N?
56 kg
This term is described as a change in speed or direction
Acceleration
A semi truck takes longer and more force to slow down than a car. This is an example of which law of motion?
Second
What is the formula used in Newton's 2nd Law?
F=MA
When the forces on an object are balanced, the object ________
Does not change its motion
Newton's 2nd Law is also known as ______
Acceleration
This is a measure of the pull of gravity on an object
Weight
A swimmer uses their arms and legs to push on the water, what is the reaction force?
The water pushing back on the swimmer
When the mass of an object increases, what happens to the acceleration?
Decreases
How do you calculate net force?
Find the sum of all forces acting on the object
Newton's 3rd Law is also known as ________
Law of action/reaction
This term is described as a push or a pull
Force
Explain using Newton's 1st Law the importance of wearing a seatbelt
The seatbelt is an unbalanced force that works against the inertia of your body to keep you safe in the event of an accident.
What two factors is gravity dependent on?
Equal/opposite
According to Newton's 2nd Law, if the force increased, but the mass remained the same, what happened to the acceleration?
The acceleration increased
Define the term inertia
An object's tendency to resist a change in motion
Explain what happens to a person's weight if they go to Jupiter. What happens to their mass?
Their weight increases because Jupiter has a stronger gravitational pull than Earth. Their mass stays the same.
What is inertia dependent upon?
The object's mass