Question

Find the force required to accelerate a 2kg mass by 5m/s

Answer 1

force equals to mass multiply acceleration

equal to 2*5=10Newton

Answer 2

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Hence, the shear of the wire is halved.

Let's find the ratio of the two resistances.

Resistance varies inversely as the shear.

Hence, the multiplier of resistance will be 2.

Resistance varies directly as the length.

Hence, the multiplier of resistance will be 2.

Hence, the ratio of the two resistance will be 1:4.

→ Second resistance: 4R [First resistance: R]

Hence, the change in the resistance is 3R.