Question 1 :
A body floats in a liquid contained in a beaker. If the whole system as shown in figure falls freely under gravity, then the upthrust on the body due to liquid is<br> <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5e917b4d67ed907b153d2d29">

Question 3 :
Assertion: It is difficult to move a bike with its breaks on. Reason: Sliding friction is greater than rolling friction.

Question 5 :
While the arrow moves towards its target, the force acting on it are due to gravity and due to ____ of air.

Question 6 :
A car is moving in a circular horizontal track of radius {tex} 10 \mathrm { m } {/tex} with a constant speed of {tex} 10 \mathrm { m } / \mathrm { s } {/tex}. A bob is suspended from the roof of the car by a light wire of length {tex} 1.0 \mathrm { m } {/tex}. The angle made by the wire with the vertical is

Question 7 :
A truck is carry a box of mass $m = 50 \,kg$ on its flat horizontal rough surface with coefficient of friction $p = 0.3$. It is crossing a circular track of radius $27 \,m$. What is the maximum speed of the truck to that the box does not slide from the muck while moving on the circular path?

Question 8 :
In the figure shown, the pulleys and strings are massless. The acceleration of the block of mass {tex} 4 m {/tex} just after the system is released from rest is {tex} ( \theta ) {/tex} {tex} \left. = \sin ^ { - 1 } 3 / 5 \right) {/tex}<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5e0f0251ed6e36502132f260"><br>

Question 9 :
A pail filled with sand has a total mass of {tex} 60 \mathrm { kg } . \mathrm { A } {/tex} crane is lowering it such that it has an initial downward acceleration of {tex} 1.5 \mathrm { m } / \mathrm { s } ^ { 2 } . {/tex} A hole in the pail allows sand to leak out. If the force exerted by the crane on the pail does not change, what mass of sand must leak out before the downward acceleration decreases to zero?

Question 12 :
The coefficient of friction between the tryes and the road is 0.25. the maximum speed with which a car can be driven round a curve of radius 40 m without skidding is (assume g= 10$ms^{-2}$)

Question 13 :
The two blocks, {tex} m = 10 \mathrm { kg } {/tex} and {tex} M = 50 \mathrm { kg } {/tex} are free to move as shown. The coefficient of static friction between the blocks is {tex}0.5{/tex} and there is no friction between {tex} M {/tex} and the ground. A minimum horizontal force {tex} F {/tex} is applied to hold m against {tex} M {/tex} that is equal to<br> <img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/NEET/5e105565ed6e36502132f8ea' />

Question 14 :
A block of mass 4 kg is kept on a rough horizontal surface. The coefficient of static friction is 0.8. If a force of 19 N is applied on the block parallel to the floor, then the force of friction between the block and floor is

Question 15 :
A cricket ball of mass 150 g collides straight with a bat with a velocity of 10<img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5e9177d61a95347cde4a0ec5"> . Batsman hits it straight back with a velocity of 20<img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5e9177d61a95347cde4a0ec5">. If ball remains in contact with bat for 0.1s, then average force exerted by the bat on the ball is

Question 16 :
A spring balance and a physical balance are kept in a lift. In these balances equal masses are placed. If now the lift starts moving upwards with constant acceleration, then

Question 17 :
A bullet is fired from a gun. The force on the bullet is given by {tex} F = 600 - 2 \times 10 ^ { 5 } t {/tex} where {tex}F{/tex} is in newton and {tex}t{/tex} in second. The force on the bullet becomes zero as soon as it leaves the barrel. What is the average impulse imparted to the bullet?