A stone of mass 150 g moves in a vertical circle on end of a length of string. radius of cirlce is 7

English

Gujarati

Hindi

5.Work, Energy, Power and Collision

medium

A stone of mass $150\ g$ moves in a vertical circle on the end of a length of string. The radius of the cirlce is $70\ cm$ and the speed of the stone at the topmost point $P$ is $3.5\ m/s$ . For the instant at which the stone passes through the highest point $P$ , the centripetal force is nearly ......... $N$ (take $g = 10\ m/s^2$ )

A

$2.63$

B

$26.3$

C

$1.13$

D

None of the above

Solution

$\frac{\mathrm{mv}^{2}}{\mathrm{r}}=\frac{0.15 \times 3.5^{2}}{0.7}$

$\approx 2.63 \mathrm{N}$

Standard 11

Physics

Share

Similar Questions

A stone of mass $m$ is tied to a string and is moved in a vertical circle of radius $r$ making $n$ revolutions per minute. The total tension in the string when the stone is at its lowest point is

medium

A pendulum bob on a $2\, m$ string is displaced $60^{°}$ from the vertical and then released. What is the speed of the bob as it passes through the lowest point in its path ………. $m/s$

medium

Figure below shows a small mass connected to a string, which is attached to a vertical post. If the ball is released, when the string is horizontal as shown below. The magnitude of the total acceleration (including radial and tangential) of the mass as a function of the angle $\theta$ is

normal

(KVPY-2011)

A stone of mass m is tied to a string and is moved in a vertical circle of radius $ r$ making n revolutions per minute. The total tension in the string when the stone is at its lowest point is

medium

A weightless thread can support tension upto $30 \,N$. A stone of mass $0.5 \,kg$ is tied to it and is revolved in a circular path of radius $2 \,m$ in a vertical plane. If $g = 10m/{s^2}$, then the maximum angular velocity of the stone will be …….. $rad/s$

medium