Newtons Laws
The acceleration includes what two factors.
What is distance and time?
What is the resistance to a change in motion called?
What is inertia
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
This states that an object’s motion will not change unless an unbalanced force acts on the object.
What is Newton's First Law?
IF something is moving at a constant speed, is it balanced or unbalanced?
balanced
The unit of force is this.
What is the Newton?
applied and friction
what are contact forces
Which has more tendency to resist a change in its motion, an elephant, a feather, or a mouse?
What is the elephant?
Newton's Third Law of Motion states that the action and reaction must be what TWO things
equal and opposite
If forces are equaled out, they are _________ forces.
Balanced
an object in motion stays in motion unless acted upon by an outside force, is an example of which law?
Newton's first law
A student lets a toy car roll four times down a ramp that is 1 m long. Each time the student covers the surface of the ramp with a different material. The student measures the time it takes the car to roll down the ramp and records the info. Each trial has a different time. What conclusion can you draw about the ramp?
Different amounts of friction
F = m x a
Newton's 2nd law
non-contact force that affects all objects with mass
gravity
Which has more acceleration due to gravity, an elephant, a feather, or a mouse?
One object pushing on another will always receive a push in return. True or false.
True
What teeny tiny property causes friction to be greater?
What are microwelds?
If someone is pushing a box with 15 Newtons of force to the right, and another person is pulling the box with 5 N of force, what is the net force?
20 N to the right
If a box is being pushed with a force of 5 N to the right and also being pushed, in the opposite direction with a force of 12 N, would you add or subtract to find the net force?
subtract
push or pull
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?
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.
What is less mass or less inertia?
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
how do you find speed?
What is distance divided by time
causes an object to move
unbalanced force
net force
what is the total force acting on an object called
According to Newton’s Second Law, if the force increased but the mass remained the same, what happened?
The objects acceleration increased.
dribbling a basketball is an example of which law?
What is Newton's third law
A ball bounces away when another ball hits it. Which law does this demonstrate?
Newton's 3rd law or Conservation of Momentum
The attractive force that exists between all objects that have mass?
What is gravity
The standard unit of mass is this.
kilogram
used to determine that motion has taken place
reference point