PLEASE HELP WILL GIVE BRAINLIEST 4. Suppose Galileo drops a ball off of the leaning tower of Pisa. As the ball falls towards the earth it gains kinetic energy, what is the source of this energy?
a. the energy is stored in the Earth b. the energy is stored in the ball due to its position
c. the energy is created by the falling ball d. all of the above

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)