Question

An athlete weighing 50kg has 100j of kinetic energy calculate his speed​

Answer 1

Answer:

2 m/s

Explanation:

use the formula K =1/2 mv²

as k = 100j     and   mass = 50 kg

put the values

 100 = 1/2 (50) v²

100 × 2 = 50 v²

200 = 50 v²

200/50 = v²  

v² = 4

v = √4  = 2 m/s

v = 2 m/s

Mark me as brainliest

Answer 2

Given:

• Weight = 50 Kg = 50000 g
• Kinetic energy = 100 J

To Find:

• The speed of the athlete.

Solution:

The formula to find kinetic energy is given by,

K.E = 1/2×m×$v^2$

Where "m" is the mass and "v" is the speed.

Now on rearranging the above equation in terms of "v" we get.

v = √[(2×K.E)/m] → {equation 1}

On substituting the given values in equation 1 we get,

⇒ v = √[(2×1000/50]  {multiplying the terms in the brackets in the numerator}

⇒ v = √(200/50)  {dividing the terms}

⇒ v = √4  {square root}

⇒ v = 2 m/s

∴ The speed of the athlete = 2 m/s.