Question

The kinetic energy of an object of mass 'm' moving with a velocity of 5 m/s is 25 J. what will be its kinetic energy when its velocity is increased three times.​

Answer 1

Answer:

Answer:

$\huge\underline{\overline{\mid{\bold{\red{Solution:-}}\mid}}}$

Given:-

• Mass (m)➝m
• Velocity (v)➝5m/s
• Kinetic energy➝25J

Situation:-

• Velocity of this object is increased three times.

To find:-

• Kinetic energy

Here:-

$Kinetic \: Energy = \frac{1}{2} m {v}^{2}$

$⟹25J = \frac{1}{2} \times m \times {(5)}^{2}$

$⟹m = \frac{50}{25} kg$

$⟹m = 2kg$

Here we got the mass➝2kg

Now according to the situation:-

• When velocity triples/becomes three times more:

$Kinetic \: energy = \frac{1}{2} m {v}^{2}$

$⟹ Kinetic \: energy = \frac{1}{2} \times 2 \times {(15)}^{2}$

$⟹Kinetic \: energy = 225J$

• Hence the kinetic will be 225J

Hope it helps you ✔️✔️

@Fabled