A block m is kept stationary on the surface of an accelerating cage as shown in Fig. 8.236. At the given instant, study the following statements regarding the block.
i. Normal reaction performs positive work on the block.
ii. Frictional work done on the block is negative.
iii. No net work is done by normal reaction and friction on the block.
Now mark the correct answer.

Only statement (i) is correct

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

Only statement (ii) is correct

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

Only statement (iii) is correct

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

All statements are correct

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

Open in App

Solution

The correct option is D Only statement (i) is correct
Since,the system move along $x - a x i s$ and work done due to normal reaction will be positive.
Since, there is no relative motion with respect to
Encline work done by the friction is zero.
Hence,
option $A$ is correct answer.

Suggest Corrections

Similar questions

Q. A block is projected up on a rough inclined plane which is fixed. Mass of black is

m

& initial speed is

v_{o}

. If the block stops after sometime, now which of the statement is correct regarding work done by friction?

Statement I: Block $A$ is moving on the horizontal surface towards the right under the action of force $F$ . All surfaces are smooth. At the instant shown, the force exerted by block $A$ on block $B$ is equal to the net force on block $B$ .

Statement II: From Newton’s Third Law, the force exerted by Block $A$ on Block $B$ is equal in magnitude to force exerted by block $B$ on $A$ .

Q. A force F is applied towards right on a block sliding at a speed of 2 m/s on a horizontal surface as shown below. Choose the correct statement regarding friction acting on the block at this instant.

Q. A block of mass

m

is kept on a platform which starts from rest with a constant acceleration

g / 2

upwards, as shown in the figure. Work done by normal reaction on block in time

t

is___?

Q. A block of mass

m

is kept on a platform which starts from rest with constant acceleration

\frac{g}{2}

upwards as shown in the figure. Work done by the normal reaction on the block in time

t

is:

Join BYJU'S Learning Program

The correct option is D Only statement (i) is correctSince,the system move along x−axis and work done due to normal reaction will be positive.Since, there is no relative motion with respect to Encline work done by the friction is zero.Hence,option A is correct answer.

The correct option is D Only statement (i) is correct
Since,the system move along $x - a x i s$ and work done due to normal reaction will be positive.
Since, there is no relative motion with respect to
Encline work done by the friction is zero.
Hence,
option $A$ is correct answer.