A lever is balanced. A force of 50 N acts at a distance of 30 cm from the pivot. What force acts at a distance of 10 cm on the other side?
Answer and explanation
Correct answer: D. 150 N
- Step 1: Balance: force1 x distance1 = force2 x distance2. Step 2. 50 x 30 / 10 = 150 N. Answer: 150 N. Why not the others: 16.7 N: the distances were used the wrong way round. 70 N: the numbers were added and subtracted. 180 N: this value comes from a slip in the arithmetic.
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