A man has a mass of 90 kg. While standing in an elevator that is accelerating downwards at 1.5 m/s/2, what is the apparent weight of the man?

A. 1017.9 N
B. 45 N
C. 747.9 N
D. 882.9 N

R = 747 N

Explanation:

Given that,

Mass of a man = 90 kg

The elevator is accelerating downwards at 1.5 m/s².

We need to find the apparent weight of the man. When the lift is coming in downward direction, the apparent weight is given by :

R = m(g-a)

Putting all the values,

R = 90(9.8-1.5)

R = 747 N

Hence, the correct option is (c).

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.