Question

Block of mass 2 kg is hanging over a smooth and light pulley .the other end of string is pulled by a constant force f is equals to 40 newtons the kinetic energy of the particle increases in a given interval of time .what is the tension of the string? displacement of the block in the given interval of time is?​

Answer 1

Answer:

Tension on the string is 40N

Displacement is 2m

Work done by gravity is -40J

Work done by Tension is 80J

Explanation:

Answer 2

The tension of the string is 40 N.

The displacement of the block in given interval of time is 2 m.

Explanation:

Given that,

Mass of block = 2 kg

Force = 40 N

Suppose, the kinetic energy of the particle increases 40 J in a given interval of time.

We need to calculate the tension

Using balance equation

$F=T$

$T=40$

$T=40\ N$

We need to calculate the displacement

Using work energy theorem

$W_{net}=\Delta K.E$

Put the value into the formula

$(40-20)\times s=40$

$s=2\ m$

Hence, The tension of the string is 40 N.

The displacement of the block in given interval of time is 2 m.

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Topic : Displacement

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