A horizontal force 12 , N pushes a block weig | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The normal force $N$ exerted by the wall on the block is equal to the applied horizontal force: $N = 12 \, N$.The maximum static frictional force

Vedclass · Accepted Answer

Block will not move and force exerted on the block by the wall is $13 \, N$

Vedclass · Answer

(D) The normal force $N$ exerted by the wall on the block is equal to the applied horizontal force: $N = 12 \, N$.The maximum static frictional force $f_{s,max}$ is given by $f_{s,max} = \mu_s N = 0.5 	imes 12 \, N = 6 \, N$.The weight of the block is $W = mg = (1/2) \, kg 	imes 10 \, m/s^2 = 5 \, N$.Since the weight $W = 5 \, N$ is less than the maximum static friction $f_{s,max} = 6 \, N$,the block will not move.The wall exerts two forces on the block: the normal force $N = 12 \, N$ (horizontal) and the static frictional force $f_s = 5 \, N$ (vertical,balancing the weight).The total force exerted by the wall on the block is the resultant of these two perpendicular forces: $F_{total} = \sqrt{N^2 + f_s^2} = \sqrt{12^2 + 5^2} = \sqrt{144 + 25} = \sqrt{169} = 13 \, N$.

Similar Questions

$A$ ball is dropped on the floor from a height of $20 \ m$. It rebounds to a height of $5 \ m$. The ball remains in contact with the floor for $1 \ s$. The average acceleration during contact is (acceleration due to gravity $g = 10 \ m/s^2$): (in $m/s^2$)

$A$ block of mass $M$ is placed on a horizontal surface and it is tied with an inextensible string to a block of mass $m$,as shown in the figure. $A$ block of mass $m_0$ is also placed on $M$. If there is no friction between any two surfaces,then:

$A$ small block of mass $0.1 \ kg$ lies on a fixed inclined plane $PQ$ which makes an angle $\theta$ with the horizontal. $A$ horizontal force of $1 \ N$ acts on the block through its center of mass as shown in the figure. The block remains stationary if (take $g = 10 \ m/s^2$):

$A$ hockey player is moving northward and suddenly turns westward with the same speed to avoid an opponent. The force that acts on the player is

$A$ man pulls a block heavier than himself with a light horizontal rope. The coefficient of friction is the same between the man and the ground,and between the block and the ground.

Vedclass Test Series

Exam Paper Generator

Online Exam Module