Question

Calculate the Kinetic Energy of a ball of mass 4 kg moving with velocity 2 m/s.

1.8J

2.16J

3.4J

4.2J​

Answer 1

Answer:

8j

Explanation:

k.e =1÷2 mv^2 now put the value of mass and velocity 1÷2 A×4 ×2^2 =8 j

Answer 2

${ \boxed{\boxed{\begin{array}{cc} \maltese  \bf \: given \\ \\ \to \rm mass \: of \: the \: ball \: \: m = 4 \: kg \\ \\ \to \rm \: velocity \: \: \: v = 2 \: m {s}^{ - 1} \\ \\ \to \bf \: kinetic \: energy \: \: K.E = \: to \: find \\ \\ \\ \pink{ {\boxed{\begin{array}{cc} \maltese  \bf \: we \: know \: that \\ \\ \bf \: K.E = \frac{1}{2}m {v}^{2} \\ \\ = \frac{1}{2} \times 4 \times {2}^{2} \\ \\ = \frac{1}{2} \times 4 \times 4 \\ \\ = \frac{16}{2} \\ \\ = 8 \rm \: J\end{array}}}}\end{array}}}}$