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DiegoRBaquero · Answer 1 · 2023-02-17T12:14:18+0000

ANSWER

v = 19.9 m/s

Step-by-step explanation

The kinetic energy formula is

We have that KE = 19800 J, m = 100 kg and we have to find v.

Solving the equation of kinetic energy for v:

$v=\sqrt[]{(2KE)/(m)}$

Replace with the values:

$v=\sqrt[]{\frac{2\cdot19800J}{100\operatorname{kg}}}=\sqrt[]{\frac{39600\frac{\operatorname{kg}\cdot m^2}{s^2}}{100\operatorname{kg}}}=\sqrt[]{396(m^2)/(s^2)}\approx19.9m/s$

The velocity of the roller coaster at point C is 19.9 m/s

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