Question 1 : <font>The average energy consumed by a human being in a day is:</font></p>

Question 2 : <font>The work done by a body against friction always results in :</font></p>

Question 3 : <font>A truck and a car moving with the same kinetic energy are brought to rest by the application of brakes which provide equal retarding forces. Which of them will come to rest in a shorter distance?</font></p>

Question 4 : <font>Consider the following statements A and B. Identify the correct choice in the given answers:</font></p> <p align="justify"> <font>A. In a one dimensional perfectly elastic collision between two moving bodies of equal masses, the bodies merely exchange their velocities after collision</font></p> <p align="justify"> <font>B. If a lighter body at rest suffers perfectly elastic collision with a very heavy body moving with a certain velocity, then after collision both travel with same velocity</font></p>

Question 5 : <font>When two spheres of equal masses undergo glancing elastic collision with one of them at rest, after collision they will move:</font></p>

Question 6 : A block of mass 3 kg slides down a rough curved path from point <em>A</em> as shown. If it stops at <em>C</em>, the work done by friction is (<em>g</em> = 10 ms^–2) <br> <img style='object-fit:contain' style="max-width:240px;" src="https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5f16bf71bfef6349df00fce4"/>

Question 7 : <font>A ball of mass m approaches a wall of mass M (&gt;&gt; m) with speed 4 m/s along the normal to the wall. The speed of wall is 1m/s towards the ball. The speed of the ball after an elastic collision with the wall is -</font></p>

Question 8 : A particle is whirled in a vertical circle of radius <em>l</em> such that on imparting a horizontal velocity when particle is hanging vertically, the particle reaches a maximum height of {tex}\frac{\text{27}l}{\text{16}}{/tex}from its initial bottom position. Then

Question 9 : <font>Light from a discharge tube containing hydrogen atoms falls on the surface of a piece of sodium. The kinetic energy of the fastest photoelectrons emitted from sodium is 0.73 eV. The work function for sodium is 1.82 eV. The rocoil speed of emitting atom assuming it to be at rest before ionisation is (ionisation potential of hydrogen is 13.6 eV).</font></p>

Question 10 : A particle initially at rest at the highest point of a smooth vertical circle is slightly displaced. It will leave the circle at a vertical distance <em>h</em> below the highest point. Then <br> <img style='object-fit:contain' style="max-width:240px;" src="https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5f16bfd5bfef6349df00fd3c"/>

Question 11 : A point starting from rest moves along a circle having a radius 20 cm with a constant tangential acceleration of 5 cm/s². The time from start of motion, when normal and tangential acceleration are equal, will be

Question 12 : <font>A body of mass 10 kg at rest is acted upon simultaneously by two forces 4N and 3N at right angles to each other. The kinetic energy of the body at the end of 10 sec is</font></p>

Question 13 : <font>A pump having efficiency 75% lifts 800 kg water per minute from a 14 m deep well and throws at a speed of 18 ms</font>^{<font>-1</font>}<font>. Find the power of the pump.</font></p>

Question 14 : <font>A bus can be stopped by applying a retarding force F when it is moving with a speed v on a level road. The distance covered by it before coming to rest is s. If the load of the bus increases by 50 % because of passengers, for the same speed and same retarding force, the distance covered by the bus to come to rest shall be</font></p>

Question 15 : <font>A pump motor is used to deliver water at a certain rate from a given pipe. To obtain 'n' times water from the same pipe in the same time the amount by which the power of the motor should be increased - </font> </p>

Question 16 : <font>In the question number 7, the work done by friction in 10 s is </font> </p>