- #1
tubworld
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I got a question below:
A force F = (2x i + 6y j) N acts on an object as it moves in the x direction from the origin to x = 5 m. Find the work W = Fdr done on the object by the force.
I felt that the answer shld be 2x * 5 = 10 but it's too simple to be true is it?
One more question:
A mass (m = 3 * 10^-5 kg) drops vertically at constant speed under the influence of gravity and air resistance.
(a) After the drop has fallen h metres, what is the work done by gravity?
(b) what is the work done by the air resistance?
The ans shld be mgh for part A and -mgh for part b right? cos both are in opposite direction?
A force F = (2x i + 6y j) N acts on an object as it moves in the x direction from the origin to x = 5 m. Find the work W = Fdr done on the object by the force.
I felt that the answer shld be 2x * 5 = 10 but it's too simple to be true is it?
One more question:
A mass (m = 3 * 10^-5 kg) drops vertically at constant speed under the influence of gravity and air resistance.
(a) After the drop has fallen h metres, what is the work done by gravity?
(b) what is the work done by the air resistance?
The ans shld be mgh for part A and -mgh for part b right? cos both are in opposite direction?