A mass of 10kg moves with a velocity of 4m/s. What is its kinetic enery

note " ' " is raised to power, eg 2'2

K.E = 0.5mv'2
1/2=0.5 * mass=m * velocity=v*v.
so 0.5 * 10kg * 4 * 4ms
= 80joules

A man hold a child on his shoulder while watching football match, how much work has he done , if the game last for two hours

1/2*1000*4square=16000/2=8000joules

I'm a student of oasis jesuir academy

None of it is correct because the option My teacher gave me none of the answer is their,so I'm sorry for stressing all of you. Thank you very much for your help and support.

Nothing

I want more answers on kE

Kinetic Energy is 1/2 * mass * velocity^2

KE will be in joules, if mass is in kilograms, and velocity in meters/second.

To calculate the kinetic energy of an object, you can use the equation:

Kinetic Energy = (1/2) * mass * velocity^2

Given that the mass is 10kg and the velocity is 4m/s, we can substitute these values into the equation:

Kinetic Energy = (1/2) * 10kg * (4m/s)^2

First, square the velocity:

Kinetic Energy = (1/2) * 10kg * 16m^2/s^2

Multiply the mass and squared velocity:

Kinetic Energy = 80kg * m^2/s^2

Thus, the kinetic energy of the object is 80 joules.