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4-1.Newton's Laws of Motion
normal
A $500\, kg$ crane takes a turn of radius $50 \,m$ with velocity of $36 \,km/hr.$ The centripetal force is ......... $N$
A$1200$
B$1000$
C$750$
D$250$
Solution
(b)$F = \frac{{m{v^2}}}{r} = \frac{{500 \times 100}}{{50}} = {10^3}\,N$
Standard 11
Physics