Forces
The 2 forces acting on the paper while it is freely falling to the ground?
What are Fg (gravity) and Ff (air resistance)?
F=ma
What is Newton's 2nd Law?
This states that energy cannot be created or destroyed
What is the Law of Conservation of Energy?
This is the unit for power.
What is Watts?
When someone speaks, their vocal cords ____ to create a sound.
What is vibrate?
When sitting in a chair, this force is pushing up and supporting you.
What is FN (normal)?
Objects in motion stay in motion
What is Newton's 1st Law?
Food is an example of this type of energy.
What is Chemical Potential Energy?
True/False: A student does work when they hold a book over their head.
What is false?
This is a measure of the number of waves per second.
What is frequency?
A student is stretching a spring. This is the agent of the elastic force.
Who is the student?
For every action there is an equal and opposite reaction.
What is Newton's 3rd Law?
As a marble rolls up an incline, this occurs to the marble's GPE.
What is increase?
A lightbulb does 50 J of work every 5 seconds. This is the power of the bulb.
What is 10 Watts?
P=50/5
This is the substance through which a wave travels.
What is a medium?
A box is pushed to the right with a force of 7 N, friction pushes back with a force of 5N. This is the overall net force.
What is 2N to the right?
Your body bouncing back into your seat after hitting the lap bar is an example of which this law in action.
What is Newton's 3rd Law?
A basketball player who weighs 60 Kg jumps at a velocity of 3 meters per second. This is her kinetic energy the instant before hitting the floor.
What is 270 J?
KE=1/2(60)(32)=270
A 6 kg crate is pulled by a 10N force over a distance of 10m. This is the work done on the crate.
What is 100J?
W=Fd=(10)(10)
This wave travels left and right and vibrates left and right (parallel).
What is a longitudinal wave?
A boy slides a salt shaker along a table toward the right. As the salt shaker slides, this is the direction in which friction acts on the salt shaker.
What is the left?
A wrecking ball has a mass of 1000kg. It accelerates towards a building at a rate of 6 m/s. This is the force being applied to the wrecking ball.
What is 3000 N?
F=1000x6=6000 N
Dylan is pushing a car up a ramp 35 kilograms, this is how much higher above the ground Dylan must push it to increase its potential energy by 600 Joules.
What is 1.7 m?
h=GPE/mg=600/(35)(9.8)
A boy pushes his truck with a force of 60N at a speed of 1m/s for 60 seconds. This is the work he does.
What is 3600 J?
d=(1)(60)=60m
W=(60)(60)=3600
This is the speed of a wave that has a frequency of 10 Hz and a wavelength of 4m.
What is 40 m/s?
v=(10)(4)