Answer:
The elevator must be moving upward.
Explanation:
During the motion of an elevator, the weight of the person deviates from his or her actual weight. This temporary weight during the motion is referred to as "Apparent Weight". So, when the elevator is moving downward, the apparent weight of the person becomes less than his or her actual weight.
On the other hand, for the upward motion of the elevator, the apparent weight of the person becomes more than the actual weight of that person.
Since the apparent weight (645 N) of the student, in this case, is greater than the actual weight (615 N) of the student.
<u>Therefore, the elevator must be moving upward.</u>
Answer:
Impulse is 
The average force is 
Explanation:
When a mass
undergoes a change in velocity
, its impulse
is

and if a force
is acting for time
, then the impulse
is given by

Now the mass of the spores in kg is

we calculate the impulse from the first formula:


Now that we have impulse, we calculate the average force on the spore from the second formula:

