Question 1 :
If a body moving in a circle of radius $10m$ is covering a displacement of $20m$, in $10s$, then the speed of the body can be
Question 4 :
When a body moves in circular path with uniform speed, it's motion is called uniform circular motion<br>State whether given statement is True/False?
Question 5 :
In a uniform circular motion, the magnitude and direction of velocity at different points remain the same.
Question 7 :
In uniform circular motion, the velocity vector and acceleration vector are:
Question 8 :
Assertion: Linear momentum of a body changes even when it is moving uniformly in a circle.
Reason: In uniform circular motion velocity remains constant.
Question 9 :
An astronaut orbiting the earth in a circular orbit $120 km$ above the surface of earth, gently drops a ball from the spaceship. The ball will:<br/>
Question 10 :
Uniform Circular Motion refersto a motion of an object in a circle at a constant _________.
Question 11 :
Circular Motion can be an example of periodic motion. State whether the given statement is True or False.
Question 12 :
The tip of seconds' hand of a watch exhibits uniform circular motion on the circular dial of the watch<br>State whether given statement is True/False?
Question 13 :
A particle of mass 3 kg moves under the force of $4\hat{i}+8\hat{j}+10\hat{k}$ N. If the particle starts from rest and was at origin initially. Its new co-ordinates after 3 seconds is :
Question 14 :
A cart is released from rest at the top of a long ramp at time $t = 0$ seconds and moves down the ramp at a constant acceleration rate. At a time of t, the cart has reached a speed of $2 m/s$. How fast will the cart be moving at the time of $3t$?
Question 17 :
A stone tied to a string is whirled in a circle. As it is revolving, the rope suddenly breaks.Then :
Question 18 :
A frog that jumps upwards is under the influence of gravity and accelerates at a constant rate.<br>If it has an initial upwards velocity of ${v}_{0}=5.00{m}/{s}$, approximately how far above the ground will it be when it has velocity $v=-2.50{m}/{s}$?
Question 19 :
State whether the given statement is True or False :The motion of the moon around the earth in circular path is an accelerated motion.<br/>
Question 20 :
A ball is shot vertically upward with a given initial velocity. It reaches a maximum height of $100$m. If on a second shot, the initial velocity is doubled then the ball will reach a maximum height of.
Question 21 :
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 22 :
(1) : In uniform circular motion the kinetic energy of the body is constant.<br/> (2) : In uniform circular motion the tangential force is zero.<br/>
Question 23 :
Which one of the following is most probably not a case of uniform circular motion?
Question 24 :
If two masses $ m_1,\ m_2$ are thrown vertically upwords with the same velocity, what is the difference in the maximum height gained by them? ($ m_1 > m_2$)<br/>
Question 25 :
A car is moving with speed $2 m/s$ crosses a electric post and starts accelerating at a constant rate of $2m/s^2$. How far past the electric post will the car be after 3 s?
Question 26 :
State whether the given statement is True or False :The earth moves around the sun with a uniform velocity.<br/>
Question 28 :
A body falls freely under gravity from rest and reaches the ground in time $t$. Write expression for the height fallen by the body.
Question 31 :
The free end of a thread wound on a bobbin is passed round a nail $A$ hammered into the wall. The thread is pulled at a constant velocity. Assuming pure rolling of bobbin, find the velocity $v_0$ of a center of theybobbin at heh center at he instant when the thread forms an angle $\alpha$ with the vertical.
Question 32 :
A particle moves on the $x-$ axis. When the particle's acceleration is positive and increasing then
Question 33 :
A particle moving with a constant acceleration from A to B in the straight line AB has velocities u and v at A and B respectively. If C is the mid-point of AB then the velocity of particle while passing C will be:
Question 34 :
When a body starts from rest, the acceleration of the body after 2 seconds is _____of its displacement.
Question 36 :
The distance traveled by a particle starting from rest and moving with an acceleration $\dfrac{4}{3}ms^{-2}$ in the third second is - <br/>
Question 37 :
<b>Statement 1:</b>Two balls of different masses are thrown vertically upward with same speed.They will pass through their point of projection in downward direction with the same speed.<br><b>Statement 2:</b>The maximum height and downward velocity attained at the point of projection are independent of the mass of the ball
Question 39 :
A stone is dropped from the top of a tower of height $49$ $m$. Another stone is thrown up vertically with velocity of $24.5\ m/s$ from the foot of the tower at the same instant. They will meet in a time of
Question 40 :
A car sometimes overturns while taking a turn. When it overturns, it is
Question 41 :
The two ends of a train moving with a constant acceleration pass a certain pole with velocities $u$ and $v$. The velocity with which the middle point of the train passes the same pole is
Question 42 :
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 43 :
A stone is thrown vertically upward from cliff with velocity $5$ m/s. It strikes the pond near the base of cliff after $4$ sec. The height of cliff is?
Question 44 :
In the above question , the time after which the centres of gravity of the two bodies will have a separation $h$, is<br/>
Question 45 :
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 46 :
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 47 :
Let A, B, C, D be points on a vertical line such that AB = BC = CD. If a body is released from position A, the time interval of descent through AB, BC and CD are in the ratio:
Question 48 :
A plane has a takeoff speed of $88.3 m/s$ and requires $1365 m$ to reach that speed. Determine the time required to reach this speed.
Question 49 :
A bullet initially moving with a velocity $20ms^{-1}$ strikes a target and comes to reset after penetrating a distance $10 cm $ in the target .Calculate the retardation caused by the target.
