Work
Formula for work
What is W=F*d?
or
What is W=Ef-Ei
Formula for power
What is P=W/t?
or
What is P=F*v
Formula for gravitational potential energy
What is PEg=mgh?
Formula for kinetic energy
What is KE=1/2(mv2)?
What is Ei + W = Ef?
or
What is Ei = Ef?
A system where work is done
What is open?
SI units for power
What are Watts?
SI units for energy
What are Joules?
Kinetic energy
What is the energy of a moving object?
The type of system where the change in mechanical energy is zero.
What is closed?
A 24 kg wagon pulled with a 40. N force at an angle of 60° over a 5.0 meter distance requires this much work.
c) What is 100 J?
This is the amount of time needed to do a job requiring 100. J of work and 50. W of power.
What is 2.0 s?
Must be included in the system for gravitational potential energy to be present
What is the Earth?
Number of objects needed to be in a system for there to be kinetic energy present
What is one?
The height at which an object hitting the ground with a velocity of 12 m/s.
What is 7.3 m?
You carry a 3.0 kg physics textbook across the room a distance of 6.0 m.
What is 0 J?
This is the amount of time needed to do a job requiring 50. W of power and 20. N of force to be exerted over 5.0 m.
What is 2 s?
The height a 75. kg person has when they have 1350 J of gravitational potential energy.
What is 1.8 m?
The mass of a basketball is thrown at 2.0 m/s and has 4.0 J of kinetic energy.
What is 2.0 kg?
The factor the final velocity of a ball changes by doubling the height at which it is dropped.
What is the square root of 2?
Work done when a 2.0 kg block goes across a 5.0 m surface with a coefficient of kinetic friction of 0.4.
What is 39 J?
This is the number of joules of work that a 100-watt lightbulb does in one hour.
What is 360,000 J?
The decrease in gravitational potential energy experienced by a 50.-kg firefighter on a ladder 10.-m high when descending to 5.0 m above the ground.
What is 2450 J?
The factor the kinetic energy of a 20. kg objects increases by when the speed in tripled.
What is 9?
The final speed a 10.-kg wagon has after dropping to a 2.0 m elevation when it starts at a height of 4.0 m and an initial velocity of 3.0 m/s.
What is 4.9 m/s?