Question

plz solve it it's mcqs​

Answer 1

Hey ❤️ here is your answer ⤵️

Answer :

• Option (5). velocity = 10 m/s
• Option (2) Momentum = 50 kg.m/s

Given :

Kinetic Energy ( K.E. ) = 250 J.

Mass of the body = 5 kg.

Using Formula :

• $\sf K.E. = \frac{1}{2} × m × v²$

Where,

$\longrightarrow$ m = Mass

$\longrightarrow$ v = Velocity

• Momentum (p) = mv

Where,

$\longrightarrow$ m = Mass

$\longrightarrow$ v = Velocity

Solution :

For velocity ,

• $\sf K.E. = \frac{1}{2} × m × v²$

• $\sf 250 = \frac{1}{2} × 5 × v²$

• $\sf 250 × 2 = 5 × v²$

• $\sf 500 = 5 × v²$

• $\sf \frac{500}{5} = v²$

• $\sf \frac{\cancel{500}^{\: \: \cancel5 × 100}}{\cancel5} = v²$

• $\sf 100 = v²$

• $\sf v = \sqrt{100}$

• $\sf \underline{\boxed{v = 10 \: \: m/s}}$

For momentum ,

• p = m v

• p = 5 × 10

• $\sf \underline{\boxed{p = 50 \: \: kg.m/s}}$

I hope it helps you ❤️✔️