Question

If m=10g, v=200 m/s then KE is

2 J

5 J​

Answer 1

Answer:

200J

Explanation:

Given,

Mass(m) = 10g

= 10 × 0.001kg

= 0.01kg

= 10^-2 kg

Velocity(v) = 200 m/s

To Find :-

Kinetic Energy(K.E).

Formula Required :-

$\bf K.E=\dfrac{1}{2}mv^2$

Solution :-

$K.E=\dfrac{1}{2}\times 10^{-2}\times (200)^2$

$=\dfrac{1}{2}\times 10^{-2}\times 40000$

$=\dfrac{1}{2}\times 400$

= 200J

K.E = 200J

Know More :-

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

• m = mass
• v = velocity
• K.E = Kinetic Energy

2) P.E = mgh

• m = mass
• g = gravity
• h = height
• P.E = potential energy