Work
What is the formula for work?
Work = Force x Distance
The SI unit for work is?
The SI unit for work is Joules!
Fill in the blank:
Power is the rate a which ______ is done.
Power is the rate at which work is done.
What does kinetic energy depend on?
It depends on speed and mass!
What is the formula used to find potential energy?
PEg = mgh
or
gravitational PE = mass x free-fall acceleration x height
The SI Unit for work is
Joules!
Energy is the ability to do _________.
Energy is the ability to do work.
The formula for used to measure power is:
Power (W) = Work (J) divided by Time (S)
The _________ of an object that is due to the object’s motion is called kinetic energy.
Energy
What is the formula used for gravitational potential energy?
gravitational PE = mass x free-fall acceleration x height
Work is done on an object when a ___________ causes a displacement of the object.
Force
____ _____ ______ is done by all the forces acting on an object is equal to the change in the object’s kinetic energy.
The net work done by all the forces acting on an object is equal to the change in the object’s kinetic energy.
Name at least one of the power formulas:
- Power = Work divided by Time Interval
or
- Power = Force x Speed
What is the formula for Kinetic Energy?
KE = 1/2mv^2
or
Kinetic Energy = ½ mass x velocity^2
Potential Energy is the energy associated with an object because of the __________, shape, or condition of the object.
Potential Energy is the energy associated with an object because of the position, shape, or condition of the object.
A train covers a distance of 15 km and that the force is causing it to accelerate at a rate of 0.7 m/s2.
10.5 J
The net work done on a body equals its change in _________ __________.
The net work done on a body equals its change in kinetic energy.
Two Horse pull a cart. Each exerts a force of 250.0N at a speed of 2.0 m/s for 10.0 min. How much work is being done by the horses?
-300,000J
. What is the Kinetic Energy of a 150 kg object that is moving with a speed of 15 m/s?
KE= 16875J
Gravitational potential energy (GPE) depends on what from a zero level?
Gravitational potential energy depends on height from a zero level.
A force of 40 N acts on body of mass 5 Kg. What is the amount of work done if the total displacement is 2 m and is in the direction of the force applied?
80J
A 2.0 kg book is accelerated from 2.0 m/s to 4.0 m/s as it is pulled across a table. What is the amount of work needed to accelerate the book to the nearest tenth of a joule?
W=12.01
The SI unit for power is what?
The SI unit for Power is the Watt (W)
An object has a kinetic energy of 88 J and a mass of 45 kg , how fast is the object moving?
v=1.98 m/s
___________________ is the energy available for use when a deformed elastic object returns to its original configuration.
Elastic Potential Energy:
-is the energy available for use when a deformed elastic object returns to its original configuration.