Question 249: Laws of Motion

Question

A man weight 80 kg. He stands on a weighting scale in a lift which is moving  upwards with a uniform acceleration of 5 m/s
2
. What would be the reading on the scale ? (g = 10 m/s
2
)

Accepted Answer

Reading of the scale = Apparent wt. of the man = m(g + a)
= 80 (10 + 5) = 1200 N

Answer

zero

Answer

400 N

Answer

800 N

Answer

1200 N

Laws of Motion

A man weight 80 kg. He stands on a weighting scale in a lift which is moving upwards with a uniform acceleration of 5 m/s 2 . What would be the reading on the scale ? (g = 10 m/s 2 )

Choose the correct answer: