Question

A 1kg mass has a kinetic energy of 1 joule when its speed is?

Answer 1

Heya......!!!!

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Given in the question. :

⇒ Mass = 1 kg

⇒ kinetic energy ( KE ) = 1 J

We know that kinetic energy:-

⇒ KE = $\frac{1}{2}mv^2$

=> 1 = 1/2*1*v²

→ Speed = √2 m/sec

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Hope It Helps You. ^_^

Answer 2

Answer:

● When it's speed is 1.4m/s

=> $K.E = 1/2 m {v}^2$

=> $1 = 1/2 × 1 × {v}^2$

=> $2 = {v}^2$

=> ${v}^2 = 2$

=> $v = √2$

or

=> $1.4m/s$