Question

Look at this picture and please help

Answer 1

Answer : The kinetic energy will be 24 J.

Explanation : Given,

Mass of marble = 3 kg

Velocity of a marble = 4 m/s

Formula used to calculate the kinetic energy is:

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

where,

K.E = kinetic energy

m = mass

v = velocity

Now putting all the given values in this formula, we get:

$K.E=\frac{3kg\times (4m/s)^2}{2}$

$K.E=24kg.m^2/s^2=24J$            $(1J=1kg.m^2/s^2)$

Therefore, the kinetic energy will be 24 J.