Question

a person pushes a 72 kg patient on a 15 kg trolley producing an acceleration of 0.6 metre per second square how much work does the Sandhu by pushing thepatient and trolley through a distance of 2.5 metre how farmers the person pushes the trolley to do 140 joules of work does the work done by the person depends on the speed of the trolley ​

Answer 1

No, the work done on an object W = F s, does not depends on whether the object moves through  the distance "d" quickly or slowly.

Explanation:

• (a) Assume the trolley moves without friction?

F= ma=(72 kg+15 kg)(0.60 m/s^2) = 52 N

W = F s =(52 N)(2.5 m) = 130 J

• (b)How far must the person push the trolley to do 140 J of work.

As W = F. d

d=W / F=140 J/52 N = 2.7 m

Thus d = 2.7 m

• (c) Does the work done by the person depends on the speed of the trolley?

No, the work done on an object W = F s, does not depends on whether the object moves through  the distance "d" quickly or slowly.

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