A man of mass 60 kg, is riding in a lift. The weights of the man, when the lift is accelerating upwards or downwards at are respectively:
720 N and 480 N
480 N and 720 N
600 N and 600 N
None of these
Lift accelerating down with 'a' -
V= variable
- wherein
Apparent weight Actual weight
Lift is accelerating Upward with acceleration = a -
- wherein
Apparent weight > Actual weight
for upwards w= m(g+a) = 60 (10+2)
w= 60X12 = 720 w
for downwards w= m(g-a) = 60 (10-2)
w= 60X8 = 480 w
Option 1)
720 N and 480 N
correct option
Option 2)
480 N and 720 N
Incorrect option
Option 3)
600 N and 600 N
Incorrect option
Option 4)
None of these
Incorrect option