The work done in pushing a block of mass 10kg from bottom to the tpp of a frictionless inclined plane 5m long and 3m high is
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Cos Ф = adjacent / hypotenuse
The adjacent we get through pythagoras theorem.
5² - 4² = 3²
= 3
Cos Ф = 3/5 = 0.6000
Work = Force × Cos Ф × height
= 10 × 10 × 0.6 = 60 Joules
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