Question

A bird is flying in the air at a 4 m/s. If the mass of the bird is 7kg what is it’s kinetic energy

Answer 1

Answer:

Kinetic energy:

"The form or phase of energy which is possessed by the body due to its motion or state of its motion."

• As the mathematical formula for K.E energy is;

• K.E=1/2 m×v²,⇒(1)

Explanation:

Now, we have the following data, in the given problem:

• Velocity,v=4 m/s,
• Mass,m=7 kg,
• K.E=?,
• Solution:
• So, putting the values inside the equation(1),we will get the following answer:
• K.E=1/2×(7)×(4),
• K.E=1/2×28,
• K.E=28/2,
• K.E=14 Joules(or in other unit kg m²/sec²).

Answer 2

Answer: The kinetic energy of the flying bird is 56 Joules.

Explanation:

Mass of the bird  = 7 kg

Velocity of the flying bird = 4 m/s

Kinetic energy of the bird will be given by :

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

$K.E.=\frac{1}{2}\times 7 kg\times (4 m/s)^2=56 Joules$

The kinetic energy of the flying bird is 56 Joules.