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Variation Equation:

KE = (k) (m) (v)²      where k is constant

ANSWER:  11,520 Joules

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The formula for Kinetic Energy is KE= k(mv^2)/2, 
where k is the proportionality constant,
m is the mass in kg,
v is the velocity in m/s.

By using the first set of data, we get:
4500=k (90 x 20^2)/2
which gives k a value of 0.25.

For the second set of data, we use the same formula:
KE = k(mv^2)/2
KE = 0.25 (90x32^2)/2

Finally, we get the value KE = 11, 520 J.

*note that J = (kg m^2)/s^2

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