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Nov 2012 p42 q1
3609
A block is pushed along a horizontal floor by a force of magnitude 45 N acting at an angle of 14° to the horizontal (see diagram). Find the work done by the force in moving the block a distance of 25 m.
Solution
The work done by a force is given by the formula:
\(WD = Fd \cos \alpha\)
where \(F\) is the force, \(d\) is the distance, and \(\alpha\) is the angle between the force and the direction of motion.