Question

✦✧✧ Question ✧✧✦ ➠ ᴅᴏɴᴛ sᴘᴀᴍ⚠️ 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 speed is doubled? it is given here doubled not tripled​..​

Answer 1

$\huge\mathfrak\purple{Answer} \:$

Given :-

The kinetic energy of an object of mass m moving with a velocity of 5m /s is 25 joule.

ㅤ

Find :-

What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times

ㅤ

Solution :-

We know that, KE is Kinetic energy. Firstly finding m (mass).

ㅤ⟶KE=1/2×m×5²

⟶ 5² = 25ㅤ(5 × 5 = 25)

⟶KE=1/2×m×25

⟶1=1/2m=2kg

ㅤ

When the velocity is doubled :-

⟶KE=2×25

⟶ KE=50J

Answer 2

Hey there !

Given:-

★ The kinetic energy of an object of mass m moving with a velocity of 5m /s is 25 joule.ㅤ

Find:-

★ What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times?ㅤ

Calculations:-

★ We know that, KE is Kinetic energy. Firstly finding m (mass).

$KE = \frac{1}{2} \times m \times {5}^{2}$

${5}^{2} = 25 \: (5 \times 5 = 25)$

$KE = \frac{1}{2} \times m \times 25$

$1 = \frac{1}{2} m = 2kg$

When the velocity is doubled :-

$KE = 2 \times 25$

$KE = 50J$

When the velocity is increased 3 times :-

$KE = 3 \times 25$

$KE = 75J$

Remember/Note:

★ If the velocity is increased/doubled the kinetic energy also increase/doubled.

Thanks!