# physical science

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A man pulls a lawnmower with a mass of 50 kilogram accross a lawn, its pulling force is 400 newtons at angle of 50 degrees with a horizontal line.(a) resolve the force into two components , one parallel to the ground and one perpendicular to the ground .(b) explain why it is easier to pull the lawnmower than to push it.

• physical science -

(A) the force parallel to the ground is 400 cos50.
The force perpendicular to the ground is 400 sin50..
(B) When pulling the lawnmower, the upward applied force opposes t he weight force. This has the effect of reducing the friction force.

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