Question 1 :
A horizontal force of {tex} 10 \mathrm { N } {/tex} is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is {tex} 0.2 . {/tex} The weight of the block is<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5e101e644faa335027dc7b66"><br>

Question 2 :
Two monkeys of masses {tex} 10 \mathrm { kg } {/tex} and {tex} 8 \mathrm { kg } {/tex} are moving along vertical rope which is light and inextensible, the former climbing up with acceleration of {tex} 2 \mathrm { m } / \mathrm { s } ^ { 2 } {/tex} while the latter coming down with a uniform velocity of {tex} 2 \mathrm { m } / \mathrm { s } {/tex}. Find the tension (in newtons).<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5e101dc94faa335027dc7ae8"><br>

Question 3 :
A block of mass 2 kg rests on a rough inclned plane making am angle of $30^o$ with the horizontal. The coefficient of static friction between the block and the plans is 0.7. The frictional force on the block is $(g = 9.8 m/s^2)$ :

Question 4 :
In the diagram shown, friction is completely absent. If a force {tex} F {/tex} has been applied on the wedge such that it moves with a constant velocity than value of normal reaction {tex} N {/tex} is<br> <img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/NEET/5e105321de596850506e3835' />

Question 5 :
Rocket engines lift a rocket from the earth surface because hot gas with high velocity

Question 6 :
The force required to just move a body up the inclined plane is double the force required to just prevent the body from sliding down the plane. The coefficient of friction is {tex} \mu . {/tex} The inclination {tex} \theta {/tex} of the plane is

Question 7 :
While waiting in a car at a stoplight, and 80 kg man and his car are suddenly accelerated to a speed of 5 ms{tex}^{-1}{/tex} as a result of rear-end collision. If the time of impact is 0.4 s, find the average force on the man

Question 8 :
A solid sphere, a hollow sphere and a solid cylinder, all having equal mass and radius, are placed at the top of an incline and released. The friction coefficients between the objects and the incline are equal and but not sufficient to allow pure rolling. Greastest time will be taken in reaching the bottom by

Question 9 :
Sand is being dropped on a conveyor belt at the rate of M kg/s. The force (in N) necessary to keep the belt moving with a constant velocity of v m/s will be:

Question 10 :
The minimum force required to start pushing a body up rough (frictional coefficient {tex} \mu ) {/tex} inclined plane is {tex} F _ { 1 } {/tex} while the minimum force needed to prevent it from sliding down is {tex} F _ { 2 } {/tex}. If the inclined plane makes an angle {tex} \theta {/tex} from the horizontal such that {tex} \tan \theta = 2 \mu {/tex} then the ratio {tex} \frac { F _ { 1 } } { F _ { 2 } } {/tex} is