3. in a demonstration learning activity,
a. the teacher shows children how
something works or how to complete an
entire activity.
b. each child shows and tells about a
favorite toy.
c. learning takes place through a process
of solving a specific problem.
d. children explore their surroundings and
learn based on their own curiosity and
interests.

The teacher shows children how something works or how to complete an activity.

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j