Question

Find the velocity of a body of mass 100g having KE of 20J

Answer 1

KE=1/2mv^2
20=(1/2)×0.1×v^2
(20×2)÷0.1=v^2
40÷0.1=v^2
400=v^2
so, v=√400
so, v=20m/s.

Answer 2

Hola ⚘⚘

Answer:

• Final velocity of the body = 20m/s

Explanation:

Given:

• Kinetic energy = 20 J

• Mass of the body = 100 g (0.1 kg)

Tofind:

• Final velocity of the body

Calculation:

using kinetic energy formula

>> K.E = 1/2 mv^2

where,

• K.E = Kinetic energy

• m = mass

• v = velocity

>> 0.1*v^2 = 40

>> v^2 = 400

>> v = √400

>> v = 20 m/s

Final velocity of the body is 20m/s. $\:$