Work
The formula for work
W=FxD
The formula for power
P = W/t
Kinetic energy is the energy of __________
Motion
A wedge is made of how many inclined planes
2
Energy is defined as ability to do
What is work measured in?
Joules
What is power measured in?
Watts
Potential energy is referred to as ________ energy
stored
What type of a simple machine is a ramp
Inclined Plane
Energy cannot be created or destroyed...it's law
Law of Conservation of Energy
A 50N force moves an object 4m. Calculate work.
200 J
A student does 400 J of work in 5 seconds. Calculate power.
80 W
The formula for KE
KE = 1/2mv2
Machine that changes direction of force using a rope
Pulley
What type of energy allows a tennis ball to squish when hit with a racket?
Elastic
Can force and motion be in the opposite direction for work to happen?
No
Doing the same work faster, like in climbing/running up stairs, results in more
Power
A 7.6 kg object moves at 7.4 m/s. Find KE
208 J
What is the pivot point of a lever?
Fulcrum
Planet Earth receiving energy from the sun and radiating heat back into space is what type of system?
Open
If there is 300 J of work done to move a box 2.5 m, how many newtons of force are being applied?
120
A machine that is 60 watts applies 900 J of work, how long did it take?
15 s
A 10 kg object is 72.5 m high. What is the GPE?
7105 J
What type of simple machine is a screw?
Inclined Plane
Energy lost due to friction becomes this type of energy?
Thermal Energy