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

$A$ car of mass $500\, kg$ is driven with acceleration $1\, m/s^2$ along a straight level road against a constant external resistance of $1000\, N$. When the velocity is $5\, m/s$,the rate at which the engine is working is .............. $kW$.

$A$ truck of mass $2800 \ kg$ is moving at a speed of $15 \ m/s$. $A$ frictional force of $500 \ N$ and a forward force of $1200 \ N$ act on it. The distance covered by the truck in $10 \ s$ is .......... $m$.

$A$ balloon with mass $m$ is descending down with an acceleration $a$ (where $a < g$). How much mass should be removed from it so that it starts moving up with an acceleration $a$?

$A$ constant force $F = m_2g/2$ is applied on the block of mass $m_1$ as shown in the figure. The string and the pulley are light and the surface of the table is smooth. The acceleration of $m_1$ is

Vedclass Test Series

Exam Paper Generator

Online Exam Module