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Work-And-Energy
Work-And-Energy Questions
A spring with a constant of #2 (kg)/(s^2)# is lying on the ground with one end attached to a wall. An object with a mass of #4 kg # and speed of # 3 m/s# collides with and compresses the spring until it stops moving. How much will the spring compress?
A wrench with a length of #48 cm# is being used to unscrew a #6 cm# bolt. If a torque of #72 Nm# is needed to overcome the friction keeping the bolt in place, what is the minimum torque that must be applied to the wrench to unscrew the bolt?
An electric fan has a power output of 60 W. How much work is done if the fan operates for 120 s?
At room temperature, an oxygen molecule, with mass of #5.31 x 10^-26 kg#, typically has a KE of about #6.21 x 10-21# J. How fast is the molecule moving?
A mass of 35kg inside a 15kg wagon is pulled by a man across a sandy beach with a coefficient of .25, if the pulling force is 250N, at an angle 25 degrees above the horizontal, how do you determine the net force?
How much work would it take to push a # 1 kg # weight up a # 5 m # plane that is at an incline of # pi / 6 #?
A balanced lever has two weights on it, the first with mass #8 kg # and the second with mass #64 kg#. If the first weight is # 12 m# from the fulcrum, how far is the second weight from the fulcrum?
If a spring has a constant of #7 (kg)/s^2#, how much work will it take to extend the spring by #51 cm #?
A ball with a mass of #640 g# is projected vertically by a spring loaded contraption. The spring in the contraption has a spring constant of #32 (kg)/s^2# and was compressed by #5/8 m# when the ball was released. How high will the ball go?
How many joules are there in a candy bar containing 230,000 calories?
How much work would it take to horizontally accelerate an object with a mass of #6 kg# to #7 m/s# on a surface with a kinetic friction coefficient of #1 #?
If an object with a mass of # 3kg # changes speed from #5m/s# to # 6m/s#, by how much does its kinetic energy change?
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Recent Questions
Recent Answers
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asked at 2020-02-25 21:49:03
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asked at 2020-02-25 21:44:42
Mendelian genetics and polygen...
answered at 2020-02-25 21:49:03
#x=4# #4-sqrt(x-3...
answered at 2020-02-25 21:48:36
#4-sqrt(x-3) = sq...
answered at 2020-02-25 21:48:36
DMAPP + Isopentenyl diphosphate (C5) ⇌ Geranyl diphosphate...
answered at 2020-02-25 21:48:01
See the entire solution proces...
answered at 2020-02-25 21:47:23
as follows...
answered at 2020-02-25 21:47:21
#f'(x)=2x-5#...
answered at 2020-02-25 21:46:16
You can do this in steps....
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$1.48...
answered at 2020-02-25 21:46:15
Static electricity deals with...
answered at 2020-02-25 21:46:10