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Question 2 A train of mass 526 tonnes is pulled along a level track against a resistance to motion of 46 N per tonne of its mass. How much work (in kJ) is done in moving the train through 8.3 m?
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36 votes
36 votes
Question 2

A train of mass 526 tonnes is pulled along a level track against a resistance to motion of 46 N per tonne of its mass. How much work (in kJ) is done in moving the train through 8.3 m?

User Madebydavid
by
3.0k points

1 Answer

28 votes
28 votes

Answer:

Work 201 kJ

Step-by-step explanation:

Given:

m = 526 tonnes

k = 46 N/tonnes

S = 8.3 m

______________

A - ?

Traction force:

F = k·m = 46·526 ≈ 24 200 N

Work:

A = F·S = 24 200·8.3 ≈ 201 000 J or A=201 kJ

User Schteppe
by
2.9k points
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