Two objects of equal masses having the velocities 1 m - s and 2 m - s respectively- Find out the ratio of their kinetic energies-A- 1- 2B- 1- 4C- 4- 1D- 2- 1

The correct option is B 1 : 4 We know that Kinetic energy (KE) = 1/2 m v^2 Ratio of kinetic energies = mv_1^2/mv_2^2 Ratio of kinetic energy = (1/2)2 = 1 : 4 ...

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Standard IX

Physics

Factors Affecting Kinetic Energy

Two objects o...

Question

Two objects of equal masses having the velocities 1 $\frac{m}{s}$ and 2 $\frac{m}{s}$ respectively. Find out the ratio of their kinetic energies.

1 : 2

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1 : 4

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4 : 1

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2 : 1

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Solution

The correct option is B
1 : 4

We know that Kinetic energy (KE) = $\frac{1}{2}$ m $v^{2}$

Ratio of kinetic energies = $\frac{m {v_{1}}^{2}}{m {v_{2}}^{2}}$

Ratio of kinetic energy = (1/2)²

= 1 : 4

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Two objects of equal masses having the velocities 1 ms and 2ms respectively. Find out the ratio of their kinetic energies.

The correct option is B 1 : 4 We know that Kinetic energy (KE) = 12 m v2 Ratio of kinetic energies = mv12mv22 Ratio of kinetic energy = (1/2)2 = 1 : 4

Two objects of equal masses having the velocities 1 $\frac{m}{s}$ and 2 $\frac{m}{s}$ respectively. Find out the ratio of their kinetic energies.

The correct option is B
1 : 4

We know that Kinetic energy (KE) = $\frac{1}{2}$ m $v^{2}$

Ratio of kinetic energies = $\frac{m {v_{1}}^{2}}{m {v_{2}}^{2}}$

Ratio of kinetic energy = (1/2)²

= 1 : 4