2nd Law
What is another name for the FORCE of gravity?
Weight
What is a force
A push or pull factor
What is the UNIT for force?
Newtons
Inertia is the same as an object' s _________.
Mass
What is the REACTION force in the following situation?
Rubbing your hand on the carpet.
The carpet rubs your hand!
Speed is equal to:
Speed= Distance / Time
If you have a mass of 1000 kg and an acceleration of 2 m/s, what is the force?
F= MA
F= (1000)(2)
F= 2000 N
What is the force equal to when an object is AT REST?
0N
What is Newton's 3rd Law?
For every action there is an equal and opposite reaction
Which object will have more INERTIA, an object with a mass of 5kg or an object with a mass of 10kg?
For every action there is an ______ and _______ reaction.
Equal and Opposite
Force is equal to:
Force = Mass x Acceleration
What causes mass to accelerate or change direction?
An unbalanced force
Newton's _______ law defines a force to be equal to change in mass and acceleration.
2nd Law
Newtons 1st Law says _______________.
An object at rest will remain at rest and an object in motion will continue moving at a constant velocity unless acted upon by an unbalanced force
Pop Question!
Pop Answer!
A canon ball is shot out of a canon. Which will have a LESSER acceleration: the cannon or the ball?
The cannon
Density is equal to:
Density = Mass / Volume
Mass and ___________ directly affect force.
Acceleration
What is friction?
An unbalanced force that slows you down
Think of the olden days: How does a horse pull a cart along?
A horse moves a cart because THIS reaction force of the horse pushing against the ground is greater than the reaction pair of forces on the wheels of the cart.
Why is deflecting an asteroid away from the Earth almost impossible?
It's mass is HUGE!
Even though the force of a bug on a moving car is equal to the force of the moving car on the bug,
the consequence to the mass of the bug is caused by this type of CHANGING motion.
Acceleration
Momentum is equal to:
Momentum = Mass x Velocity
What is Newton's 2nd law?
Force is equal to mass multiplied by acceleration
What does net force mean?
The term used for the sum of all the forces acting on an object
What is opposing force?
The opposite of the active (action) force.
The type of movement a mass has when the net force equals zero is ____________.
No movement!
A soccer ball with a mass of 20g is traveling with an acceleration of 20m/s2. With what force does it hit the window its aimed at?
400N
Acceleration is equal to:
(final velocity - initial velocity) / time