Answers

  • Brainly User
2016-05-13T13:19:00+08:00
Variation Equation:

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

ANSWER:  11,520 Joules

Please click image below to view solution.
0
2016-05-13T13:30:04+08:00

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
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

0