A crane raises a crate with a mass of 180 kg to a height of 15 m. Given that the acceleration due to gravity is 9.8 m/s2, what is the crate's potential energy
at this point?
O A. 276 J
B. 198,450 J
O c. 1,152J
O D. 26,460 J

The roller coaster from problem #1 then tops a second hill at 15.0 m/s, how high is the second hill? 91.5 m 79.2 m 80.0 m 68.5 m

This is the substance(s) formed in a chemical reaction.

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.