Newtons 1st Law
According to Newton's first law, an object at rest will stay at rest unless acted upon by what?
An Unbalanced force
What is the unit of force in Newton's second law?
N
Newton(s)
What is the statement of Newton's third law of motion?
Every action has an _____
equal opposite reactions
what's the word that matches the definition?
a change in an object’s motion caused by unbalanced forces, Also known as speed.
Acceleration
A 500 kg car accelerates from motionless to 25 m/s. What is the average force acting on the car during this time?
hint: F =mxa
12500 N
F= mxa
500 x 25 = F
What is the term for Newton's First Law of Motion?
(Hint: Law of ____)
Inertia
What is the formula for Newton's second law of motion?
(Hint: calculating force)
F = mxa
Force= mass x acceleration
According to Newton's 3rd law, if you push against a wall with a force of 50 N, the wall pushes back on you with a force of?
50N
the same force
a push or a pull that acts on an object and is measured in Newtons
Force
George is participating in a rock lifting contest. The 68 kg rock starts at rest on the ground. If George exerts a 720 N force on the rock, what is the acceleration of the rock as he lifts it off the ground.
a=f/m
2x points for correct unit
10.5 m/s
(10.5882352941 m/s)
According to Newton’s First Law, what happens to the motion of an object when the net force acting on it is zero?
The object remains in its current state of motion (either at rest or moving at a constant velocity).
How does the mass of an object affect acceleration in Newton's 2nd law?
when mass increases, acceleration decreases.
When you walk forward (action), the force that propels you forward (reaction) is created by pushing against what?
the ground
an object’s resistance to a change in its motion. 1st law.
Inertia
Review question - throwback to organelles!
what is the vacuoles role in a cell?
A vacuole stores food, water and waste produced by the cell.
What is the unit for mass, which is a measure of an object's resistance to changes in motion?
Kilogram (kg)
What is the other name for Newton's Second Law?
Law of acceleration
An astronaut floating in space throws a hammer away from themself. According to Newton's 3rd law, what will happen to the astronaut?
The astronaut will slighty move away from the direction the hammer was thrown in.(the opposite direction, backwards)
a unit of measurement for force
Newton(s)
extra vocab
the resistance that one surface or object encounters when moving
friction
When two arrows are facing each other when trying to calculate net force, do you subtract or add them together??
subtract
Unit of acceleration
(bonus for
m/s
meters per second
True or False: Newton's Third Law of Motion is also known as the Law of Inertia.
false
combination of all the forces acting on the object
Net force
science trivia:
Think back to the beginning of the year. Convection and plate tectonics.
what is a convection current?
you are allowed 1 hint.
Energy or heat transfer.
A convection current is a process that involves the movement of energy from one place to another. It is also called convection heat transfer.