Calculate the work done by a car against gravity in moving along a straight horizontal road . The mass of the car is 400 kg and the distance moved is 2 m .

Explanation

Force of gravity acts on the car vertically downward while car is moving along horizontal road . i.e ., angle between them is `90^(@)`
`W =Fd cos theta`
`= Fd cos 90^(@)`
= 0 ` " " ( :. d bot F = mg)`
Work done by the car against gravity
`W Fd cos 90^(@) = 0 " " ( :. cos90^(@) = 0 )`