The question includes information that we don't need, and leaves out information
that we do need.
It doesn't matter at all what the mass of the tree is, but in order to answer the question,
we do need to know the mass of the person climbing it.
1.94 x 10-18 Joules
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The motor provides energy at the rate of 7500 Joules each second. The energy needed to raise the piano = mass of the piano x acceleration due to gravity x height = 500 x 9.81 x 1000 = 4.905 x 106 Joules time taken = 4.905 x 106 / 7500 = 654 seconds So, it would take around 11 minutes.
Power is measured in watts, or joules per second. So in 90 seconds, 1200 joules of work is equal to 1200/90 watts or 13.3 watts.
how much fencing will be needed to fence a property 6.5 meters long and 3 meters wide?
Use the formula potential energy = mgh (mass x gravity x height), mass in kilograms, gravity about 9.8 (meters per square second), height in meters. Answer will be in Joules.
1.94 x 10-18 Joules
1400 Newton-meters = 1400 joules
Work = force x distance = (4 x 10) = 40 newton-meters = 40 joules
I'm assuming you mean 160 Joules of work.What you need to know for any work questions like this is the formulaWork=Force times DistanceORW=F*DSo in this problem, you're given the Work (160 Joules) and the Distance (8 meters) and you need to find force.Plugging it into the equation:160 Joules= F *(8 Meters)Solving for FF=160 Joules/8 MetersF= 20 Joules/MeterTurns out you're lucky.. 1 Joule/Meter =1 NSo your final answer isF=20N
the answer for this question is 150 nt-m or 150 joules....................why is this my answer, how did i get this?work= newton box X distance (changed into meters)nt-m means joules or the amount of work neededthis is from mrs. macapundag's pupilfor the pshs reviewer 2
The force needed to lift the stone is (M G) = (5 x 9.8) = 49 newtonsWork = (force) x (distance) = (49 x 1) = 49 newton-meters = 49 joules
-1
Work done (joules) and time taken (seconds) is the information needed to calculate power in watts (joules/second).
Approx 2940 Joules.
The needed heat is 47,65 Joules.
The energy needed for a woman to climb a ladder is given by the change in potential energy she experiences. Defining the ground as being zero potential energy, her overall change in potential energy isEp = mghwhere Ep is the change potential energy, m is her mass, g is the gravitational acceleration (9.8m/s2 on earth) and h is the height she climbs.Ep = (90kg)(9.8m/s2)(6m) = 5292kg*m2/s2 or 5292 Joules