Forces
what is a force?
push or pull
When speed increases, what happens to peak force?
It also increases
Gravity pulls objects in what direction?
Down
What was yesterday?
The Hunter Moon
fill in the blank: when mass doubles, kinetic energy _______
what force acts in the opposite direction of motion?
friction force
_________ cannot be created or destroyed in a collision, it can only transform.
What object fell on Newton's head that made him think that there might be a force at play
An apple
What cell in our body allows us to experience touch?
Neuron
fill in the blank: when speed doubles, kinetic energy _______
quadruples
what force holds Ms. Larose's water bottle on top of the table
normal force
If two cars crash, the amount of damage depends on the speed of the cars, and this property of matter
The independent variable represents...
The variable (thing) we are changing/manipulating/etc in an experiment
Newtons 3rd Law states that every action has an _______ and _________ reaction.
equal and opposite
this type of fluid friction acts on objects falling through the air
air resistance
This type of collision happens when two objects bounce off each other without any lasting deformation.
Gravity always pulls objects towards the __________ of mass
center
What is the difference between kinetic energy and potential energy.
KE is the energy of movement, and PE is stored energy that changes relative to the position of objects.
the tendency of an object to remain in motion, or remain at rest, is known as...
this is the force of gravity on an object's mass
weight
minimizing force during a collision is to increase the time over which the force is applied, which can be achieved by increasing the contact area or using materials that deform during impact (like crumple zones in cars)
Should a feather and a tennis ball hit the ground at the same time if dropped from the same height? Why do/don't they?
They should (in a vacuum), and they don't because of friction/air resistance
What is the formula to calculate kinetic energy?
KE = 1/2mv^2
The "reaction force" to the "action force" of you pushing on the ground to jump
The ground pushes back