Newton's Law
"To every action there is an equal and opposite reaction"
3rd
As the mass of an object increases, its inertia will
increase
What type of force will cause an object at rest to accelerate.
unbalanced
What unit is used to measure force?
Newtons
The relationship among mass, force, and acceleration is explained by, which law?
2nd
A student drops a feather and rock at the same time If air resistance wasn’t a factor, which will fall faster?
They will fall at the same rate.
If an object at constant speed is traveling on a smooth surface, what will moving to a rough surface do to its motion?
slow it down, decrease acceleration.
A 25 kg box is being pushed with 100N .
4 N
A firefighter feels the hose pushing backwards onto him as he uses it to put out a fire. This is an example of which Law?
3rd
If the same force is applied to objects with different masses, which one will have the LEAST acceleration?
The one with more mass
An object that is falling freely has a constant what?
acceleration
An object with a mass of 3 has a force of 15 newtons applied to it. What is the resulting acceleration of the object?
5 m/s2
A man weighing 500 N is standing on a chair. In order to support the man, what force is the chair exerting?
500N
According to Newton’s 2nd laws, for any object, the greater the force that's applied to it, the greater its ____ will be.
acceleration
Explain why someone NOT wearing a seatbelt will fly forward when the car stops suddenly.
Due to inertia the object resist a change in motion.
You do 200 J of work pushing a box 10 m across the floor. What amount of force did he apply?
20 N
Explain the relationship between mass and force.
Mass and force are inversely proportional. (mass increases; force decreases)
Explain the relationship between force and acceleration
The acceleration would increase as the force increased.
A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them. This is an example of which Law?
1st
An object with a mass of 20g accelerates 5 m/s2 when an unknown force is applied to it. What is the amount of the force?
100 N