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  4. Calculate the force F that is applied horizontally at the axle of the wheel which is necessary to raise the wheel over the obstacle of height 0.4 m. Radius of wheel is 1 m and mass =10 kg ⋅ F is

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Q. Calculate the force $F$ that is applied horizontally at the axle of the wheel which is necessary to raise the wheel over the obstacle of height $0.4 \,m$. Radius of wheel is $1 \,m$ and mass $=10 \,kg \cdot F$ isPhysics Question Image

System of Particles and Rotational Motion

Solution:

Taking moments of forces about point $P$, we get
$F \times 0.6=100 \times 0.8$
or $F=\frac{100 \times 0.8}{0.6} N =\frac{800}{6} N$
$ =\frac{400}{3} N =133.3\, N$

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