work
potential energy
kinetic energy
conservation of energy
power
100
what are the SI units for work?
Joules / Newton-meters
100
what is the equation for potential energy?
U = mgh
100
is kinetic energy a scalar quantity or a vector quantity?
scalar
100
what is the equation for conservation of energy?
TE = U + KE
100
the units for power?
watts (W) or Joules per second (J/s)
200
In the equation W = Fdcos(theta), theta is the angle between...
the force and the displacement
200
if the total energy of the system is 1J, the particle will oscillate between which two points?
A and H
200
what is the equation for kinetic energy?
KE = (1/2)mv^2
200
if you accidentally drop an orange off a cliff that is 20 m high, what is the velocity of the orange at the bottom of the cliff?
20 m/s
200
what is the formula for power?
W/(change in time)
300
the block is moving to the right on a rough surface. what forces are currently doing work on the block, and is the work that they are doing positive or negative?
the person is supplying a force that is doing positive work, and the force of friction is doing negative work.
300
the derivative of the potential energy graph is equal to...
negative force
300
what would happen to the kinetic energy of a particle if the velocity doubled?
the kinetic energy would quadruple
300
is the energy of a ball-floor system conserved if the floor exerts frictional force on the ball?
yes
300
what is the integral of the power versus time graph?
work
400
what is the work done to accelerate a 2500 kg car from 12 m/s to 20 m/s?
320,000 J
400
which points on the graph represent unstable equillibrium?
B and E
400
two objects have the same kinetic energy, but object A has a mass of 5kg and car B has a mass of 20kg. how much faster is car A going?
twice as fast
400
if a particle moving on the x-axis starts at rest from x = 1 m, what is the kinetic energy of the particle at x = 4m?
4 J
400
how much power does it take to accelerate a 2 kg object from rest to 10 m/s on a frictionless floor in 20 seconds?
5 W
500
a bird dragging a giant metal block across a snowy plain applies a force given by the equation F(x) = x^2 + 1. what is the work done by the bird from x = 0m to x = 9m?
252 J
500
the potential energy graph of a particle moving on the x-axis is shown above. what is the force acting on the particle at x = 8m?
6 N
500
if the work that you do on a 10 kg crate is +280 J and the crate had an initial velocity of 5 m/s, what is the final velocity of the crate? assume the ground is frictionless.
9 m/s
500
if the velocity of a 2 kg particle on the x-axis at x = 3 is 2 m/s, what is the velocity of the particle at x = 4?
square root of 6
500
how much more power does it take to accelerate a 40 kg object from rest to 5 m/s on a frictionless floor in 50 seconds than a 32 kg object?
2 W