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Standard XII

Physics

Applying NLM along 3 Axis

A 5 kg block ...

Question

A 5 kg block has a rope of mass 2 kg attached to its underside and a 3 kg block is suspended from the other end of the rope. The whole system is accelerated upwards at $2 m / s^{2}$ by an external force $F_{0}$ .What is $F_{0}$ ?

15 N

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30 N

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60 N

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120 N

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Solution

The correct option is D 120 N
For calculating the value of $F_{0}$ consider two blocks with the rope as a system F.B.D. of whole system.
$F_{0} - 100 = 10 \times 2$ ......... (i)
$F_{0} = 120 N$

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A 5 kg block has a rope of mass 2 kg attached to its underside and a 3 kg block is suspended from the other end of the rope. The whole system is accelerated upwards at 2m/s2 by an external force F0.What is F0?

The correct option is D 120 NFor calculating the value of F0 consider two blocks with the rope as a system F.B.D. of whole system.F0−100=10×2 ......... (i)F0=120N

A 5 kg block has a rope of mass 2 kg attached to its underside and a 3 kg block is suspended from the other end of the rope. The whole system is accelerated upwards at $2 m / s^{2}$ by an external force $F_{0}$ .What is $F_{0}$ ?

The correct option is D 120 N
For calculating the value of $F_{0}$ consider two blocks with the rope as a system F.B.D. of whole system.
$F_{0} - 100 = 10 \times 2$ ......... (i)
$F_{0} = 120 N$