Question

Find the reading in the weighing machine if the mass of a man is 50kg and block is 5kg

Answer 1

Answer:

The reading of weighing machine is 95 kg.

Explanation:

The reading on the scale is a measure of the force on the floor by the person. By the Newton's third law this is equal and opposite to the normal force N on the person by the floor.

∴ When the lift is ascending upwards with a acceleration of 9ms  

−2

, then

N−50×10=50×9

or $$N=50\times 10+50\times 9=50(10+9)= 950 N

∴ The reading of weighing machine is 95 kg.