science work and power quiz

what is the equation for Work

w=fd

what do the parts mean in w=fd

w=work(J), f=force(N), d=distance(m)

work happens when..

an object has motion

how much work is done on an object that has no motion?

none

Is work done while lifting a weight

yes

how much work is being done by a person who uses a horizontal force of 25N to move a desk 3.4 m?

w=85 J

what is the equation for power

p=w/t

what do the parts mean in the equation p=w/t?

p=power(W), w=work(J), t=time(sec)

what is the power of a machine that does 236 Joules of work in 43 seconds?

p=5.49 W

what is a simple machine

a machine that can do work in 1 motion/movement

do simple machines change the amount of work being done?

No, they reduce the effort force needed to complete something

what is a complex machine?

A machine that has 2 or more simple machines that work together

what is the difference between kinetic and potential energy?

kinetic energy is based off an objects motion, while potential is based off the position of the object with no motion.