You visited us 2 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard IX

Physics

Weight and Mass

Reading shown...

Question

Reading shown in two spring balances $S_{1}$ and $S_{2}$ is 90 kg and 30 kg respectively when lift is accelerating upwards with acceleration 10 m/s $^{2}$ . The mass is stationary with respect to lift. Then the mass of the block will be:

60 kg

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

30 kg

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

120 kg

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

None of these

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

Open in App

Solution

The correct option is A 60 kg
REF.Image
$T_{1} + T_{2} = m g + m a$
$m (g + a) = (T_{1} + T_{2}) 10$
$m \times 20 = 120 \times 10$
$m = 60 k g$

Suggest Corrections

Similar questions

Reading shown in two spring balances S1 and S2 is 90 kg and 30 kg respectively when lift is accelerating upwards with acceleration 10 m/s2. The mass is stationary with respect to lift. Then the mass of the block will be

Q. Reading shown in two spring balances

S_{1} and S_{2}

90 kg

and

30 kg

respectvely and lift is accelerating upwards with acceleration

10 \frac{m}{s^{2}} . If S_{1}

is elongated and

S_{2}

is compressed and mass is stationary with respect to lift, then the mass of the block will be

Q. Reading shown in two spring balances

S_{1} and S_{2}

90 kg

and

30 kg

respectvely and lift is accelerating upwards with acceleration

10 \frac{m}{s^{2}} . If S_{1}

is elongated and

S_{2}

is compressed and mass is stationary with respect to lift, then the mass of the block will be

Q. A block of mass

m

is placed on a weighing machine and it is also attached to a spring balance. The whole system is placed in a lift as shown in figure. Lift is moving with constant acceleration

10 m / s^{2}

in upward direction. The reading of the weighing machine is

500 N

and the reading of spring balance is

300 N

. Find the actual mass of the block in kg. Take

g = 10 m / s^{2}

Q. An object of mass

5 kg

is attached to the hook of a spring balance and the balance is suspended vertically from the roof of a lift. The reading on the spring balance when the lift is going up with an acceleration of

0.25 {m/s}^{2}

(g = 10 {m/s}^{2})

Join BYJU'S Learning Program

Reading shown in two spring balances S1 and S2 is 90 kg and 30 kg respectively when lift is accelerating upwards with acceleration 10 m/s2. The mass is stationary with respect to lift. Then the mass of the block will be:

The correct option is A 60 kgREF.ImageT1+T2=mg+mam(g+a)=(T1+T2)10m×20=120×10m=60kg

Reading shown in two spring balances $S_{1}$ and $S_{2}$ is 90 kg and 30 kg respectively when lift is accelerating upwards with acceleration 10 m/s $^{2}$ . The mass is stationary with respect to lift. Then the mass of the block will be:

The correct option is A 60 kg
REF.Image
$T_{1} + T_{2} = m g + m a$
$m (g + a) = (T_{1} + T_{2}) 10$
$m \times 20 = 120 \times 10$
$m = 60 k g$