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Work-And-Energy
Work-And-Energy Questions
A spring with a constant of #4 (kg)/(s^2)# is lying on the ground with one end attached to a wall. An object with a mass of #7 kg # and speed of # 5 m/s# collides with and compresses the spring until it stops moving. How much will the spring compress?
A 1000-watt microwave oven takes 60 seconds to heat a bowl of soup. How many joules of energy does it use?
If a #2 kg# object is constantly accelerated from #0m/s# to #15 m/s# over # 12s#, how much power musy be applied at #t= 3 #?
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 #1 kg# and speed of #5 m/s# collides with and compresses the spring until it stops moving. How much will the spring compress?
An object with a mass of #4 kg# is hanging from an axle with a radius of #5 m#. If the wheel attached to the axle has a radius of #15 m#, how much force must be applied to the wheel to keep the object from falling?
What is the work done by a horse that exerts an applied force of 100 N on a sleigh, if the harness makes an angle of 30° with the ground, and the sleigh moves 30 m across a flat level ice surface?
Can energy be changed from one form to another?
If a #2 kg# object is constantly accelerated from #0m/s# to #18 m/s# over # 6s#, how much power musy be applied at #t= 4 #?
If a #2# #kg# object accelerates constantly from #0# #ms^-1# to #15# #ms^-1# over #6# #s#, how much power must be applied at #t=4#?
What is the gravitational potential energy of a # 7 kg# object on a shelf # 5/6 m # high?
How can the law of conservation of mass be applied?
Are these three formulas correct?
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