Units of Force
Newtons
Units of Acceleration
m/s2
Units of Mass
Kg
support cables on suspension bridges are most stressed by which force?
What is tension forces
One object pushing on another will always receive a push in return. True or false.
True
in what unit do we measure force
what is newtons
This is value for gravity
9.8m/s2
The picture shows you how to calculate Newton's _____ Law of Motion.
Second
Newton's First Law states that
An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
This Law states that an object’s motion will not change unless an unbalanced force acts on the object.
Newton's First Law
F = m x a
Newton's 2nd law
If two rocks with different masses are rolling down a hill, will the bigger rock, or smaller rock take more force to stop?
the bigger rock
What is another name for the first law of motion?
Law of Inertia
What causes a ball that has been kicked across the ground to stop?
Friction
A car and a train are going the same speed. The car is easier to stop because...
less mass and less inertia
Newton's Third Law of Motion states that
for every action (force) in nature there is an equal and opposite reaction.
According to Newton’s Second Law, if the force increased but the mass remained the same, what happened?
The objects acceleration increased.
A ball bounces away when another ball hits it. Which law does this demonstrate?
Newton's 3rd law.
True or False: If something with a mass of 40 kg, is pushed with a force of 120N, the acceleration will be 3 m/s2?
True
If you put a notecard on a cup, and a penny on top of the notecard and flick the card so the penny falls in the cup, which force is acting on the penny so it falls down?
Friction