You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard VII

Mathematics

Expression Formation

Weights of 20...

Question

Weights of 20 kg and 30 kg are suspended from the ends of a light rod 5 m long. At which point the rod must be be suspended by means of a string to keep it horizontal?

3 m

from

30 k g

weight

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

4 m

from

20 k g

weight

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

3 m

from

20 k g

weight

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

4 m

from

30 k g

weight

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

Open in App

Solution

The correct option is C at $3 m$ from $20 k g$ weight
Torque about p should be zero
$2000 \times x$ = $300 \times (5 - x)$
$2 x = 15 - 3 x$
$5 x = 15$
$x = 3 m$
at $3 m$ form $20 k g$ weight

Suggest Corrections

Similar questions

Q. Weights of 20kg and 30 kg are suspended from the ends of a light rod 5m long, so at which point the rod must be suspended by means of a string to keep it horizontal?

A 4 m long rod of negligible weight is supported at a point 125 cm from its one end and a load of 18 kgf is suspended at a point 60 cm from the support on the shorter arm.

(a) if a weight W is placed at a distance of 250 cm from the support on the longer arm, find W.

(b) If a weight 5 kgf is kept to balance the rod, find the position.

Q. A uniform rod is

4 m

long and weight

10 K g

. If it is supported on a knife edge at one metre from the end, what weight placed at that end keeps the rod horizontal?

Q. A light rod of length

2 m

is suspended from the ceiling horizontally by means of two vertical wires of equal length tied to its ends. One of the wires is made of steel and is of cross section

0.1 c m^{2}

. A weight is suspended from a certain point of the rod such that equal stress are produced in both the wires. Which of the following are correct?

Q. Three blocks are connected by strings as shown in figure and pulled by a force

F

=

60 N

. If

m_{A} =

10 k g

m_{B} =

20 k g

, and

m_{C} =

30 k g

, then:

Join BYJU'S Learning Program

Weights of 20 kg and 30 kg are suspended from the ends of a light rod 5 m long. At which point the rod must be be suspended by means of a string to keep it horizontal?

The correct option is C at 3m from 20kg weightTorque about p should be zero2000×x = 300×(5−x) 2x=15−3x5x=15x=3mat 3m form20kg weight

The correct option is C at $3 m$ from $20 k g$ weight
Torque about p should be zero
$2000 \times x$ = $300 \times (5 - x)$
$2 x = 15 - 3 x$
$5 x = 15$
$x = 3 m$
at $3 m$ form $20 k g$ weight