A72.0 kg man stands on a spring scale in an elevator. starting from rest, the elevator ascends, attaining its maximum speed of 1.70 m/s in 1.20 s. it travels with this constant speed for the next 5.00 s. the elevator then undergoes a uniform acceleration in the negative y-direction for 1.80 s and comes to rest.(a) what does the spring scale register before the elevator starts to move? (b) what does it register during the first 1.20 s? (c) what does it register while the elevator is traveling at a constant speed? (d) what does it register during the time it is slowing down?

82.39 kg

72 kg

62.07 kg

Explanation:

Force on the scale would be

The scale would register 82.39 kg when going up

When the speed becomes constant the acceleration becomes 0. So, the scale would show 72 kg in the five seconds

Force on scale

The scale would show 65.07 kg while going down.

as technology advances, new experiments often expose problems in accepted theories. c

hope i

-lavira: )

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.