In a stationary elevator, A scale reads $800 N$ weight of a man. If elevator accelerates upward at rate of $5 m / s^{2}$ . what will the scale read?

400 N

No worries! We‘ve got your back. Try BYJU‘S free classes today!

800 N

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1000 N

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1200 N

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

1600 N

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $1200 N$
The scale reads the normal reaction on man by lift.
Given: $m g = 800 N$ or $m = \frac{800}{10} = 80 k g$ as $g = 10 \frac{m}{s^{2}}$
Now net upward force on the person $f = R - m g$
$m a = R - m g$
$R = m a + m g$
$R = 80 \times 5 + 80 \times 10$
$R = 1200 N$

Suggest Corrections

Similar questions

A man weighs 80 kg. He stands on a weighing 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. $(g = 10 m / s^{2})$

Q. A child stands on a bathroom scale while riding in an elevator. The child's weight when the elevator is not moving is 100 Ibs. What does the scale read when the elevator accelerates upward while travelling downward?

Harry is conducting his famous elevator experiments. Harry stands on a bathroom scale and reads the scale while ascending and descending John's building. Harry's mass is 80 kg. He notices that the scale readings depend on what the elevator is doing. What is the scale reading when Harry accelerates upward at 4.0 $m / s^{2}$ ?(take g=10 $m / s^{2}$ )

Q. A student weighing

500 N

stands on a spring scale in an elevator. If the scale reads

520 N

, the elevator must be:

Q. A 700 N man stands on a scale on the floor of an elevator. The scale records the force it exerts on whatever is on it. If the reading is 840N in the scale then the elevator has an accelerations of (g=

10 m {/ s}^{2}

)

Join BYJU'S Learning Program

In a stationary elevator, A scale reads 800N weight of a man. If elevator accelerates upward at rate of 5m/s2. what will the scale read?

The correct option is C 1200NThe scale reads the normal reaction on man by lift.Given: mg=800N or m=80010=80 kg as g=10ms2Now net upward force on the person f=R−mg ma=R−mg R=ma+mg R=80×5+80×10 R=1200N

In a stationary elevator, A scale reads $800 N$ weight of a man. If elevator accelerates upward at rate of $5 m / s^{2}$ . what will the scale read?

The correct option is C $1200 N$
The scale reads the normal reaction on man by lift.
Given: $m g = 800 N$ or $m = \frac{800}{10} = 80 k g$ as $g = 10 \frac{m}{s^{2}}$
Now net upward force on the person $f = R - m g$
$m a = R - m g$
$R = m a + m g$
$R = 80 \times 5 + 80 \times 10$
$R = 1200 N$