Question

What is the kinetic energy gained by a ball of mass 400 g when it moves with a speed of 10 m s-¹?​

Answer 1

Refer to Attachment for Solution.

Answer 2

$\red{ \boxed{K.E= \frac{1}{2}m {v}^{2} }}$

$\purple{ \sf{where : }}$

• $m \: \tt{is \: mass}$
• $v \: \tt{is \: velocity}$

$\purple{ \sf{here : }}$

• $m = 400 \: g = 0.4 \: kg$
• $v = 10 \: m {s}^{ - 1}$

$\implies K.E= \frac{1}{2} (0.4) {(10)}^{2}$

$\implies K.E= (0.2) (100)$

$\orange{\therefore K.E= 20 \: J}$

HOPE IT HELPS!!