Question

4. What kinetic energy has a 4 kg shotput thrown with a velocity of 13 m/s?

Answer 1

kinetic energy = 338 joules

Step-by-step explanation:

given data

mass = 4 kg

velocity = 13 m/s

to find out

kinetic energy

solution

we get here kinetic energy that is express as

kinetic energy =
`(1)/(2) * m * v^2` .................1

here m is mass and v is velocity

put here value and we get kinetic energy

kinetic energy =
`(1)/(2) * 4 * 13^2`

kinetic energy = 2 × 169

kinetic energy = 338 joules

Answer 2

Answer: 338 joules

Step-by-step explanation:

Mass of shotput = 4kg

velocity of shotput = 13 m/s

Kinetic energy = ?

Kinetic energy is the energy possessed by a moving body (shotput). It is measured in joules.

Thus, Kinetic energy = 1/2 x (Mass x velocity^2)

K.E = 1/2 x (4kg x (13m/s)^2)

K.E = 1/2 x (4 x 169)

= 0.5 x 676

= 338 joules

Thus, the kinetic energy of the shotput is 338 joules.