Question

A body of mass 4 kg weighs 4.8 kg when suspended in
a moving lift. The acceleration of the lift is (g=9.8m/s)
71) 9.80 ms -downwards
129.80 ms -2 upwards
(3) 1.96 downwards
(4) 1.96 upwards​

Answer 1

Answer:

Explanation:

Apparent weight W  

1

 

= 4.8 kg wt

= 4.8g N

When lift moves upwards,

4.8 g = 4 (g + a)

1.2g = g + a

a = 0.2 g = 0.2 × 9.8

=1.96ms  

−2

 

When lift moves with 1.96 m  s  

−2

 upwards