Newtons Laws
Formula for pressure?
Pressure = Force / Surface Area
A 1 N book, 5 N Book, and 7 N book are stacked on a desk. What is the name and magnitude of the force that is pushing against the books, perpendicular to the surface?
normal force, 13 N
The Unit of force is this.
What is the Newton?
This states that an object’s motion will not change unless an unbalanced force acts on the object.
Newton's First Law?
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?
If forces are canceled out, they are Balance or Unbalanced forces. Net Force = 0
Balanced
Forces come in _____
Pairs
Which law? F=mxa
Newton's 2nd law
This is the tendency of an object to resist a change in its motion.
inertia?
One object pushing on another will always receive a push in return. True or false.
True
When mass increases, what happens to acceleration with equal force?
It goes down because of the inverse relationship.
This property of a moving object makes it hard to stop. (mass in motion)
inertia
This natural law states that for every action, there is an equal and opposite reaction.
Newton’s Third Law?
What force is acting on all objects on earth?
gravity
What causes a ball that has been kicked across the ground to stop?
Friction
Objects with more mass are ______ to set in motion.
harder
A car and a train are going the same speed. The car is easier to stop because of this.
less mass and less inertia
This occurs whenever an object is acted upon by an unbalanced force.
acceleration?
This is required to overcome an object’s inertia.
unbalanced force?
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 ________ in a vacuum?
speed/acceleration
a wood block is being pushed with 30 N of force to the right and has 25 N of friction. What is the net force direction and magnitude?
5 N to the right
If the force of gravity pulls down on objects at 9.8 m/s2, what acceleration do you think an object would move when falling in a vacuum chamber?
9.8 m/s2
If a person stands up on ice instead of laying down and sliding the ice may break, this is because..
Greater pressure as a result of lowered surface area when standing