Question

An otter runs at a speed of 2.0 m/s with 45J of kinetic energy what is the otters mass in kg

Answer 1

Answer:

Mass is 22.5 kg.

Explanation:

At first, I am taking speed as velocity and getting,

Velocity = 2 m/s

K.E = 45 J

According to formula,

K.E = 0.5*m*v square

= 45 = 0.5*4*m

= 45 = 2m

= M = 22.5 kg

[Note: This method and answer is only applicable only if the body moves in a straight direction]

Hope this helps.