Easy -1.2 This is a straightforward one-step application of the work formula W = Fs cos θ, requiring only substitution of given values (75 = F × 5 × cos 60°) and basic algebraic rearrangement to find F = 30 N. It's simpler than average as it involves direct recall of a standard formula with no problem-solving or multi-step reasoning required.
1 A block is pulled in a straight line along horizontal ground by a force of constant magnitude acting at an angle of \(60 ^ { \circ }\) above the horizontal. The work done by the force in moving the block a distance of 5 m is 75 J . Find the magnitude of the force.
1 A block is pulled in a straight line along horizontal ground by a force of constant magnitude acting at an angle of $60 ^ { \circ }$ above the horizontal. The work done by the force in moving the block a distance of 5 m is 75 J . Find the magnitude of the force.
\hfill \mbox{\textit{CAIE M1 2012 Q1 [3]}}