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
Newton's second law states that
the acceleration of an object is directly proportional to the net force acting upon it and inversely proportional to its mass
newton's third law states that
for every action (force) in nature, there is an equal and opposite reaction
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.
F = m x a
Newton's 2nd law
A ball bounces away when another ball hits it. Which law does this demonstrate?
Newton's 3rd 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
This Law states that an object’s motion will not change unless an unbalanced force acts on the object.
Newton's First Law
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.
What is another name for the first law of motion?
Law of Inertia
According to the Second Law, acceleration is inversely proportional to this, meaning more of it results in less acceleration.
an object's mass
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