Which forces are acting on the student and the skateboard in the instant in which they are pushing off the wall? (Select all that apply) A. The force of the student pushing the wall
B. The force of gravity on the skateboard and the student
C. The force of the wall pushing on the student
D. The force of the floor pushing on the skateboard and the student
or E. Select all of the above

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.

Since the energy was not raising the temperature of the water during these segments, what was the energy used to do instead? your answer must include an explanation of what is happening to the molecules.

The power exerted by a muscle is the product of the force exerted and the velocity of contraction. the area of which of these shaded regions represents the power exerted while a weight is lifted at maximum speed?