Newtons Laws 1
This is required to overcome an object’s inertia.
unbalanced force?
This is a measure of the change in the velocity of a moving object. (speeding up or slowing down)
acceleration?
One object pushing on another will always receive a push in return. True or false.
True
Which object will hit the ground in a vacuum with the most force; feather or bowling ball?
bowling ball
Newton’s Second Law can be summarized using this equation.
force = mass x acceleration?
The unit for force
What is the Newton?
If forces are cancelled out, they are Balanced or Unbalanced forces.
Balanced
Forces come in _____
Pairs
The tendency of an object to resist a change in its motion. This is the definition of ________
inertia
When mass increases, what happens to inertia?
increases?
A car and a train are going the same speed. The car is easier to stop because of this.
less mass and less inertia
Which law? F=mxa
Newton's 2nd law
What causes a ball that has been kicked across the ground to stop?
Friction
Objects with more mass are ______ to set in motion.
harder
As an objects mass increases, what happens to its momentum?
Increases
In a vacuum chamber, what is the only force acting on objects? (name of force and number needed)
Gravity - 9.8 meters per second squared
According to Newton’s Second Law, if the force increased but the mass remained the same, what happens to acceleration?
The objects acceleration increased.
A bowling ball and a feather will fall at the same speed and acceleration in a vacuum because there is no...
air resistance, drag, or fluid friction.
A car is moving north at a speed of 60km/h with 1000N of force and is also experiencing 1200N of force in the south direction.
1. Is the car accelerating, staying still or decelerating?
2. Name one force that's acting in the south direction?
1. Decelerating.
2. Fluid friction (air resistance), rolling friction (road and tyres), sliding friction (brake pads).