Springs
Gravity
Work
Misc. From Earlier Chapters
Movie Physics
100
Springs store this type of energy
What is (Elastic) potential energy?
100
Yes or No: Is there gravity in space?
What is yes?
100
Work is equal to force times this
What is displacement?
100
A vector has these two quantities
What are magnitude and distance?
100
The force on the car's tires that is being exploited to make the car do this
What is friction?
200
The spring force equation
"What is " F_s = -kx?
"accept " F_s=kx
200
Who came up with the Universal Law of Gravity?
Who is Newton?
200
Work is equal to the change in this mechanical quantity
What is mechanical energy?
(accept kinetic or potential energy)
200
In circular motion, the angle between the force (/acceleration) vector and the velocity vector is always this angle
What is 90o?
200
Wall-E is taking advantage of this one of Newton's laws
What is Newton's 3rd law?
300
The quantity of a spring that increases when you increase the distance you pull or push a spring
What is force? (accept potential energy as this also increases)
300
Gravity exists between two objects with this property. The strength of gravity between these objects increases as this quantity increases in either object.
What is mass?
300
The unit for work
What are joules?
300
Newton's third law says that force equals the product of these two quantities
What are mass and acceleration
300
Will E Coyote has pushed this spring, with a spring constant of 500 N/m, back a distance of 1.5 meters. The amount of potential energy in the spring is this many joules
What is 562.5 J?
400
The quantity this formula calculates:
1/2 kx^2
What is potential energy? (accept the amount of work done)
400
What does the constant g represent (in words, not the number)
What is the gravitational constant of acceleration?
400
The force done when the force and displacement vectors are perpendicular
What is zero?
400
This type of friction happen when an object is moving
What is kinetic?
400
If a brick weighs 3 kgs and is thrown from a height of 10 meters, it starts with this much potential energy (use g = 10 m/s2)
What is 300 J?
(note 136 J can kill you and the amount we calculated is not including the initial kinetic energy)
500
The force if a spring with a spring constant of 100 N/m is stretched .01 m (don't forget to include units)
What is 1 N?
500
The potential energy due to gravity is given by this formula
What is mgy? (or mgh)
500
The formula for kinetic energy
What is
1/2mv^2?
500
The velocity of an object, thrown upwards in the air, when it is at its highest point
500
If hulk weighs 550 kgs and jumps .5 meters, how much energy does he crush the car with (*hint* consider potential energy) (use g = 10 m/s2)
What is 2750 J?