Question 1 :
During the sharpening of a knife with the help of a&#160;grind stone, the direction of motion of sparks is:<br/>

Question 2 :
An artificial satellite of the earth releases a&#160;packet. If air resistance is neglected, the&#160;point where the packet will hit,<br/>

Question 3 :
State whether true or false.<br/>A particle rotating in a circular path may have constant speed but velocity changes continuously.

Question 4 :
When a stone tied to a thread and rotated with the unifrom speed it performs the uniform circular motion.<br/>State whether given statement is True/False?<br/>

Question 6 :
A body is travelling in a circle at constant speed. It&#160;

Question 7 :
The only property that does not change in a uniform circular motion is

Question 9 :
What determines the nature of the path followed by the particle?<br>

Question 11 :
(1) : When a rigid body is rotating about&#160;its own axis, all particles of that body have the same&#160;angular velocity.<br/>&#160;(2) : All particles of the body have the same&#160;time period.<br/>

Question 12 :
It is possible for a body to move in a circular path with uniform speed as long as it is travelling

Question 13 :
State whether the given statement is True or False :In a uniform circular motion, the speed continuously changes because the direction of motion changes.<br/>

Question 14 :
State whether the given statement is True or False :The earth moves around the sun with a uniform velocity.<br/>

Question 15 :
An object is said to move in uniform linear motion if it travels in straight line and covers equal DISTANCE in the equal time interval, State whether given statement is True/ False?

Question 16 :
A race car accelerates uniformly from $18.5 m/s$ to $46.1 m/s$ in $2.47$ seconds. Determine the acceleration of the car. (in $m/s^2$)

Question 17 :
A particle is moving with velocity of $4\ ms^{-1}$ along positive $x-$direction. An acceleration of $1\ ms^{-2}$ is aceted on the particle along negative $x-$direction. Find the distance traveled by the particle in $10\ s$.

Question 18 :
A police party is chasing a dacoit in a jeep which is moving at a constant speed v. The dacoit is on a motorcycle. When he is at a distance $x$ from the jeep, he accelerates from rest at a constant rate? Which of the following relations is true if the police is able to catch the dacoit?

Question 19 :
If a train travelling at $72$ &#160;km/h is to be brought to rest at a distance of $200$ m then its retardation should be :

Question 20 :
<p>A block is moving in a circular path at constant speed. Which of the following statements is/are true?</p><p>I. The velocity is constant.</p><p>II. The direction of motion is constant.</p><p>III. The magnitude of velocity is constant.</p>

Question 21 :
A student throws his test paper up in the air (neglecting air resistance) with an initial speed of $8.10 m/s$. How long does it take until the paper is headed downward at a speed of $3.23 m/s$? (in s)

Question 22 :
A body with an initial velocity of $18 kmph$ accelerates uniformly at $9 cm{s}^{-2}$ over a distance of $200 m$. Find its final velocity in $m{s}^{-1}$.

Question 23 :
A ball released from a height $h$, touches the ground in $t$ seconds. After $t/2$ seconds since dropping, the height of the body from the ground is :

Question 24 :
Two bodies begin a free fall from the same height&#160;at a time interval of $N$ s. If vertical separation&#160;between the two bodies is $1$ m&#160;&#160;after $n$ seconds from&#160;the start of the first body, then $n$ is equal to:

Question 25 :
A ball is dropped from a bridge 122.5 m above a river. After the ball has been falling for 2s, a second ball is thrown straight down after it. What must the initial velocity of the second ball be so that both hit the water at the same time?

Question 26 :
A $10$ g bullet moving at $200$ m/s stops after penetrating $5$ cm of wooden plank. The average force exerted on the bullet will be?

Question 27 :
A particle is moving with uniform acceleration along a straight line ABC. Its velocity at 'A' and 'B' are 6m/s and 9m/s respectively. AB:BC=5:16 then its velocity at 'C' is

Question 28 :
A car moving along a circular path of radius R with uniform speed covers an angle $\theta$ during a given time t. What is its average velocity?

Question 29 :
A particle experience a net force that is always parallel to y-axis. If it moves along the curve $xy=a^2$ where $a$ is a constant andthe magnitude of the force is $y^n$, then $n$ is

Question 30 :
If a particle is moving in such a way that it's average acceleration turns out to be different for a number of different time intervals, the particle is said to have variable acceleration. The acceleration can vary in magnitude, or in direction or both. In such cases we find acceleration at any instant, called the instantaneous acceleration. It is defined as $\vec { a } =\underset { \Delta t=0 }{\text{lim} } \cfrac { \Delta \vec { v }&#160; }{ \Delta t } =\cfrac { d\vec { v }&#160; }{ dt } $<br/>That is acceleration of a particle at time $t$ is the limiting value of $\cfrac { \Delta v }{ \Delta t } $at time $t$ as $\Delta t$ approaches zero. The direction of the instantaneous acceleration $\vec { a } $ is the limiting direction of the vector in velocity $\Delta v$.<br/><br/><br/>A particle is moving along a straight line with $10\ m{ s }^{ -1 }$. It takes a U-turn in $5\ s$ and continues to move along with the same velocity $10\ m{ s }^{ -1 }$. Find the magnitude of average acceleration during turning.<br/>