Aball rolls from point a to point b. the total energy of the ball at point a isn’t the same as the sum of its potential energy and kinetic energy at point b. which statement best explains this situation?
the rolling ball doesn’t follow the law of conservation of energy.

some of the ball’s energy is transformed to thermal energy.

the rolling ball loses some of its energy because of gravity.

the ball absorbs some of its own potential energy.

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.