Question

A block of weight 20 N is at rest due to 50 N force
as shown in figure. Read the following statements
carefully.
() The direction of friction force on the block is
leftward
(ID) The direction of friction force on the block is
vertically upward
(ID) The magnitude of frictional force is 50 N
(iv) The magnitude of frictional force is 20 N
Correct statement(s) is/are
(1) Both (i) and (iv) (2) Only (3)
(3) Only (1)
(4) Both (1) and (3)​

Answer 1

Answer:

answer is option c

Explanation:

magnitude of frictional force is 50N because the object is at rest as the frictional force of 50N is working on it

Answer 2

Answer:

Option (2)

Explanation:

given,

block of weight = 20 N

rest due to force of  = 50 N

so, when you look at the option (i) and (ii)

We are not sure whether the frictional force is acting leftward or rightward so these statement are not right.

When we look at the (iv) statement frictional force is not equal to 20 N.

the correct statement remaining is(iii) which states that frictional force is equal to 50 N because it is the cause of the block at rest.

So, Option (2) is right.