Recent questions tagged kinematics

A feather is dropped on the moon from a height of $1.40\; meters$. The acceleration of gravity on the moon is $1.67 m/s^2$. Determine the time for the feather to fall to the surface of the moon

asked Aug 20, 2014 by meena.p

1 answer

Dhoni throws his bat vertically upwards with an initial velocity of $26.2\;m/s$ Determine the height to which the bat will rise above its initial height.

asked Aug 20, 2014 by meena.p

2 answers

Raju drops a pile of marbles from the top of a roof located $8.52\;m$ above the ground. Determine the time required for the marbles to reach the ground .

asked Aug 19, 2014 by meena.p

1 answer

From the top of a building 40 m tall, a ball a thrown vertically upwards with a velocity of $10\; ms^{-1}$ After how long will the ball hit the ground?

asked Aug 19, 2014 by meena.p

2 answers

A body moving in a straight line covers a distance of $14 m $ in the 5th second and 20 m in the 8th second. How much distance will it cover in the 15th second ?

asked Aug 19, 2014 by meena.p

1 answer

A marble rolls across a flat surface. Its initial speed is 41 m/s but it comes to rest after 10 seconds . Find the acceleration of the marble and the distance traveled by the marble as it comes to rest.

asked Aug 19, 2014 by meena.p

1 answer

A car acceleration from rest at a constant rate $\alpha$ for some time after which it decelerates at a constant rate $\beta$ to come to rest. If t is the total time elapsed , then the maximum velocity attained by the car is

asked Aug 19, 2014 by meena.p

1 answer

An electron starting from rest has a velocity that increases linearly with time i.e $v= kt$ where $k=2\;m\;s^{-2}$. The distance covered in the first 3 second is

asked Aug 19, 2014 by meena.p

1 answer

A steel ball is bouncing up and down on a steel plate with a period of oscillation of 1 second. If $g= 10\;ms^{-2}$, then if bounces up to a height of

asked Aug 19, 2014 by meena.p

1 answer

A body travelling with uniform acceleration crosses two points A and B with velocities $20\;ms^{-1}$ and $30 \;ms^{-1}$ respectively . The speed of the body at the mid-point of A and B is

asked Aug 19, 2014 by meena.p

1 answer

A bus starts from rest with an acceleration of $ 1\;ms^{-2}$ A man who is $48\;m$ behind the bus starts with a uniform velocity of $ 10\;ms^{-1}$. The minimum time after which the man will catch the bus is

asked Aug 19, 2014 by meena.p

1 answer

A stone is allowed to fall from the top of tower 100 metre high and at the same time another stone is projected vertically upwards from the ground with a velocity of $25\;ms^{-1} $. The two stones will meets after

asked Aug 19, 2014 by meena.p

1 answer

The displacement x of a particle at the instant when its velocity is v is given by $ v = \sqrt {3x+16}$ . Its acceleration and initial velocity are

asked Aug 19, 2014 by meena.p

1 answer

The distance through which a body falls in the nth seconds is h. The distance through which it falls in the next seconds is

asked Aug 19, 2014 by meena.p

1 answer

A stone is thrown upwards with velocity v. At half the height, its velocity is

asked Aug 14, 2014 by meena.p

1 answer

A ball is thrown vertically upwards from the top of a tower of height h with velocity v. The ball strikes the ground after

asked Aug 14, 2014 by meena.p

1 answer

$\begin{array}{1 1}\text{Given the following 2 statements ,which of the following choices is correct?}\\\text{Statement-1: In a uniform circular motion,the acceleration is always directed towards the centre of the circle.}\\\text{Statement-2: Otherwise the speed of the body moving along the circle will change with time}\end{array}$

asked Aug 14, 2014 by sreemathi.v

1 answer

Given the following 2 statements, which of the following choices is correct?

asked Aug 14, 2014 by sreemathi.v

1 answer

A small block slides without friction down an inclined plane starting from rest. Let $S_n$ be the distance travelled from time $t- n-1$ to $t=n$. Then $\large\frac{S_n}{S_{n_1}}$ is

asked Aug 14, 2014 by meena.p

1 answer

A car exhibits a constant acceleration of $0.300 m/s^2$ parallel to the roadway. The car passes over a rise in the roadway such that the top of the rise is shaped like a circle of radius $500\; m$. At the moment the car is at the top of the rise, its velocity vector is horizontal and has a magnitude of $6.00\; m/s$. What is the direction of the total acceleration vector for the car at this instant?

asked Aug 14, 2014 by sreemathi.v

1 answer

An object is moving around a circle of radius 1.5 meters at a constant velocity of 7 meters per second.The frequency of the motion,in revolutions per second,is

asked Aug 14, 2014 by sreemathi.v

1 answer

A car travelling on a straight road at $15.0$ meter per second accelerates uniformly to a speed of $21.0$ meters per second in $12.0 \;second$. The total distance traveled by the car in this $12.0 $ second time interval is

asked Aug 14, 2014 by meena.p

1 answer

A stereo turntable has a frequency of 33 revolutions per minute.A record of radius 15.25 centimeters is placed on the turnable and begins to rotate.The velocity of a point on the edge of the record is

asked Aug 14, 2014 by sreemathi.v

1 answer

A typical carnival ferris wheel has a radius of 9.0m and rotates 4.0 times per minute.What magnitude acceleration do the riders experience?

asked Aug 14, 2014 by sreemathi.v

1 answer

An astronaut standing on a platform on the Moon drops a hammer. If the hammer falls $6.0 $ meters vertically in $2.7 \;seconds$, what is its acceleration ?

asked Aug 14, 2014 by meena.p

1 answer

In 3 seconds,an object moving around a circle sweeps out an angle of 9 radians.If the radius of the circle is 0.5 meter,the centripetal acceleration of the object is

asked Aug 14, 2014 by sreemathi.v

1 answer

A dart is thrown at a target that is supported by a wooden backstop. It strikes the backstop with an initial velocity of $350\;m/s$ The dart comes to rest in $0.0050\;s$ What is the acceleration of the dart ?

asked Aug 14, 2014 by meena.p

1 answer

Rain is falling vertically with a speed of $4ms^{-1}$.A man riding a bicycle is travelling at a speed of $3ms^{-1}$ in the north to south direction.In order to protect himself from rain,the man should hold his umbrella at an angle $\theta$ given by

asked Aug 14, 2014 by sreemathi.v

1 answer

Two persons P and Q are standing 54m apart on a long horizontal belt moving with a speed of $4ms^{-1}$ in the direction from P to Q.Person P rolls a round stone towards person Q with speed of $9ms^{-1}$ with respect to the belt.The velocity of stone with respect to an observer on a stationary platform is

asked Aug 14, 2014 by sreemathi.v

1 answer

A sailboat acceleration uniformly from $6.0\;m/s$ to $ 8.0 [N]$ at a rate of $0.50\;m/s^2$. What distance does the boat travel ?

asked Aug 13, 2014 by meena.p

1 answer

A sports car approaches a highway on-ramp at a velocity of $20.0\;m/s $ . If the car accelerates at a rate of $3.2 \;m/s^2 $ for $5.0\;s$ , What is the displacement of the car ?

asked Aug 13, 2014 by meena.p

1 answer

A car is moving at a speed $50 \;km /h$ two seconds there it is moving at $60 \;km/h$ Calculate the acceleration of the car.

asked Aug 13, 2014 by meena.p

1 answer

A car starts from rest , moves with an acceleration $a$ and then decelerates at $b$ for some time to come to rest. If the total time taken is t, the maximum velocity is

asked Aug 13, 2014 by meena.p

1 answer