chapter 10- Work/Energy/Power

Question 1

kinetic energy ______ over increased displacement = the larger the displacement, the ______ the work done

Answer 1

increases, greater

Question 2

The stronger the force, the _____ the work done

Answer 2

greater

Question 3

work done by F is proportional to

Answer 3

F and distance

Question 4

If the object undergoes no displacement while the force acts…

Answer 4

no work is done

Question 5

A force perpendicular to the displacement…

Answer 5

does no work

Question 6

equation for transformation of energy into thermal energy

Answer 6

ΔE=FΔx

Question 7

Kinetic energy depends on an object’s ____, but potential energy depends on its _____.

Answer 7

speed, position

Question 8

work energy theorem

Answer 8

W=FΔx=ΔK=Δu (Δu when there is no friction)

Question 9

gravitational potential energy equation

Answer 9

Ug=mgh

Question 10

spring potential energy equation

Answer 10

Us=.5kx^2

Question 11

translational energy equation

Answer 11

Kt=1/2mv^2

Question 12

Law of Conservation of energy

Answer 12

ΔE=0, Ei=Ef, Ug+Us+Kt+Kr+W=Ug+Us+Kt+Kr-W

Question 13

Power equation

Answer 13

P=E/Δx=W/Δt=F(v) (for F(v), the velocity has to be constant (zero acceleration))