Unit 7 : Work, Energy And Power Physics with Calculus 1 Un
Wf=KEe-KEa
F d Wnet= delta KE
KE=1/2mr^2
w=Fd
Wnet = 1/2m{vf^2-vo^2}
F Work Done By Conservative forces Wc= - delta U
θ
Ug=mgy
D
PE=mgh
Us=1/2Kx^2-elastic potential in a spring
W=FDcosθ
Wg=-mg[y2-y1]
F(vector) Ws=-1/2K[xf^2-x0^2]
Work done by a gass = -p* delta V
D(vector)
Power = Work/timw
W=vectorF * vector D work is the transaction of Energy
W=FxDx +FyDy Power rate at which energy is transferred
Work is in J
, Unit 7 : Work, Energy And Power Physics with Calculus 1
Wnet =Fd
Wnet = 1/2m{vf^2-vo^2}
A student exert an horizontal force of 20N with his hand and pushes 10.0 kg box a distance 2m across a frictionless floor.
Calculate the magnitude of the work done by the student and the speed of the box at 2.00m mark.
Assuming Vo=0
Fd=1/2mvf^2
Fd=40J
sqrt(40(2)/m)=vf
sqrt(80/10)=vf
16 kg mass m is to be pushed with a force F a distance d=6 m along an incline to raise a height h=4 m in the process. We are assuming f
Find:
The magnitude of the force F exerted on the block to keep it from accelerating.
The work done by the force F parallel to the incline to push the block up at constant velocity.
W=FDcosθ= the angle between
Fn F d=6m
, Unit 7 : Work, Energy And Power Physics with Calculus 1
Wg=-mg[y2-y1] Us=1/2Kx^2-elastic potential in a spring
Elastic potential energ is A
PE=mgh
energ that results from an con
Gravitational potential energ is energ
object heing stretched or nee
stored by an object due to its position to
—
the reference compressed X
—
Ws=-1/2K[xf^2-x0^2]
PE>0 Stretched (goes down +), compressed (goes up (-)
Reference
PE<0
Unit 7 : Conservation Energy
Thermal energy (done by a nonconservative force) = Total work done - work done by conservative forces
A B What kind of energ do we have?
Conservation of Energ says that
C your energ at one point equals the you have kinetic energ if height y
H
energ at all points in the roller potential energ if you have some
, Unit 7 : Conservation of Energy Physics with Calculus 1
Unit 7 : Conservation Energy
Thermal energy (done by a nonconservative force) = Total work done - work done by conservative forces
A B What kind of energ do we have? :
Conservation of Energ says that
C your energ at one point equals the you have kinetic energ if height you
H H H/2
energ at all points in the roller potential energ if you have some heig
coaster could loose you have gravitational po
Eo=EA
energ
Ko+ Ugo=KA+UgA
KE=1/2mv^2
Ug=mgy
1/2mvo^2+mgH=1/2mvA^2+mgH Calculation for
1/2mvo^2=1/2mvA^2 velocity at point A
vo=vA
Wf=KEe-KEa
F d Wnet= delta KE
KE=1/2mr^2
w=Fd
Wnet = 1/2m{vf^2-vo^2}
F Work Done By Conservative forces Wc= - delta U
θ
Ug=mgy
D
PE=mgh
Us=1/2Kx^2-elastic potential in a spring
W=FDcosθ
Wg=-mg[y2-y1]
F(vector) Ws=-1/2K[xf^2-x0^2]
Work done by a gass = -p* delta V
D(vector)
Power = Work/timw
W=vectorF * vector D work is the transaction of Energy
W=FxDx +FyDy Power rate at which energy is transferred
Work is in J
, Unit 7 : Work, Energy And Power Physics with Calculus 1
Wnet =Fd
Wnet = 1/2m{vf^2-vo^2}
A student exert an horizontal force of 20N with his hand and pushes 10.0 kg box a distance 2m across a frictionless floor.
Calculate the magnitude of the work done by the student and the speed of the box at 2.00m mark.
Assuming Vo=0
Fd=1/2mvf^2
Fd=40J
sqrt(40(2)/m)=vf
sqrt(80/10)=vf
16 kg mass m is to be pushed with a force F a distance d=6 m along an incline to raise a height h=4 m in the process. We are assuming f
Find:
The magnitude of the force F exerted on the block to keep it from accelerating.
The work done by the force F parallel to the incline to push the block up at constant velocity.
W=FDcosθ= the angle between
Fn F d=6m
, Unit 7 : Work, Energy And Power Physics with Calculus 1
Wg=-mg[y2-y1] Us=1/2Kx^2-elastic potential in a spring
Elastic potential energ is A
PE=mgh
energ that results from an con
Gravitational potential energ is energ
object heing stretched or nee
stored by an object due to its position to
—
the reference compressed X
—
Ws=-1/2K[xf^2-x0^2]
PE>0 Stretched (goes down +), compressed (goes up (-)
Reference
PE<0
Unit 7 : Conservation Energy
Thermal energy (done by a nonconservative force) = Total work done - work done by conservative forces
A B What kind of energ do we have?
Conservation of Energ says that
C your energ at one point equals the you have kinetic energ if height y
H
energ at all points in the roller potential energ if you have some
, Unit 7 : Conservation of Energy Physics with Calculus 1
Unit 7 : Conservation Energy
Thermal energy (done by a nonconservative force) = Total work done - work done by conservative forces
A B What kind of energ do we have? :
Conservation of Energ says that
C your energ at one point equals the you have kinetic energ if height you
H H H/2
energ at all points in the roller potential energ if you have some heig
coaster could loose you have gravitational po
Eo=EA
energ
Ko+ Ugo=KA+UgA
KE=1/2mv^2
Ug=mgy
1/2mvo^2+mgH=1/2mvA^2+mgH Calculation for
1/2mvo^2=1/2mvA^2 velocity at point A
vo=vA
