A 26.9 g rock rolls down the hill at a speed of 81.9 m/s .What is the kinetic energy of the rock?
A)90.2 J
B)145 J
C)0.950 J
D)90200 J
E)1450 J

Question

Quizplus · Accepted Answer

The kinetic energy (KE) can be calculated using the formula KE = 1/2 mv^2, where m is the mass in kilograms and v is the velocity in meters per second. First, convert the mass from grams to kilograms: 26.9 g = 0.0269 kg. Then, plug the values into the formula: KE = 1/2 * 0.0269 kg * (81.9 m/s)^2 = 90.2 J.

A 269 G Rock Rolls Down the Hill at a Speed