Newton's 1st Law
What is Newton's First Law?
An object at rest stays at rest,
UNLESS, acted upon by an outside force
What is Newton's 2nd Law?
Force = Mass x Acceleration, f=ma
This natural law states that for every action, there is an equal and opposite reaction.
Newton’s Third Law
What is a force?
A push or a pull
What unit do we measure force in?
Newtons
If a runner is moving with an acceleration of 3 m/s2, and has a mass of 5 kg. What is the runner's force?
F=MxA
15 N
An object is being acted upon by unbalanced forces. What will happen to the object?
A change in motion/ moves
According to Newton’s Second Law, increasing the force applied to a mass will make the acceleration do what?
The acceleration will increase
Suzie collides with her younger sister, Marci, during bumper cars. Who will travel a further distance?
Marci
This is the measure of the force of gravity pulling down on an object of given mass.
Weight
This is value for gravity
9.8 meters/second2
An object at rest has this momentum.
Zero
This is required to overcome an object’s inertia.
An unbalanced force
A car and a train are going the same speed. The car is easier to stop because ?
The car has less mass and less inertia
True or False: Forces do not occur in pairs
False
How fast an object speeds up
Acceleration
What units do we use for speed (two answers)
m/s
mph
A 5kg bowling fall is sliding down the alley with an acceleration of 2m/s2, what is the total force of the bowling ball?
10 N
An apple sits quietly on the counter waiting to be eaten. Are the forces acting on the apple balanced or unbalanced?
Balanced
Which vehicle has more inertia: a semi truck or small race car?
Semi Truck
If two people of the same mass push each other backwards with the same force, what will happen?
They will be pushed back the same distance
This is the tendency of an object to resist a change in its motion.
Inertia
How do we calculate speed?
Distance/time
If a ball is moving with a force 49 Newtons and has an acceleration of 7 m/s2, what is the ball's mass?
F=MxA
7 kg
A semi truck and race car are speeding at 100mph. Which is easier to stop, the semi truck or the small race car?
Semi Truck
The force of 10N would have a greater effect on a golf ball or a 4-wheeler?
When you jump, you exert a force pushing down on the Earth and the Earth exerts an equal force pushing up on you. Why do you move and not the Earth?
The Earth has more mass and requires more force to be moved
The SI unit of mass is this.
What units do we use for acceleration?
m/s2
If a 0.5 kg paper airplane flies with a force of 2 N, what is its acceleration?
F=MxA
4 m/s2