Physics · May / June 2026 · Paper 11 · Question 8
5054Balanced and unbalanced forces
A block of mass 6.0 kg is pulled across a rough surface by a 54 N force. Force $X$ also acts on the block but in the opposite direction. The acceleration of the block is 6.0 m/s$^2$. What is the magnitude of $X$?
- A9.0 N
- B18 N
- C36 N
- D54 N
As printed in the paper
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Correct answer: B. 18 N
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