Hi all. I am trying to learn more on physics, and am at the subject on calculating work done. The formula to calculate work done is Work done = Force * Dislacement * consine(theta). I am on a question which explains: a 100N force is applied at an angle of 30 degrees to the horizontal to move a 15kg object at a constant speed for a horizontal distance of 5 metres. The answer given says "W = (100 N) * (5 m) * cos(30 degrees) = 433 J". I would like to know how why you get 433 joules? You multiply 100 by 5 to get 500, but how does multiplying by 30 give you 433. I am up to speed on realising that the work done should be less that 500 joules because of the angle, but the formula states you multiply the angle (30), so how do you multiply the angle to get a lower value than 500? Does every one follow what i'm asking? Thankyou.