Question 1 :
A body of mass $5$ kg is revolving along a circle of a radius $2$ m, with a uniform speed of $\displaystyle 4\ { ms }^{ -1 }$. The centripetal force acting on a body is ____ N.
Question 7 :
The ratio of value of gravitational constant $G$ between Earth and Moon system and Earth and Sun system is-<br>
Question 9 :
If a body of mass $2kg$ requires a <span>centripetal force of $10N$ to keep it moving in a circle of radius $5m$, then find the speed at which the body is moving.</span>
Question 10 :
A circular disc is rotating about its own axis. Two particles P and Q of the disc are at distances $4\ cm$, $6\ cm$ from the axis of rotation. The ratio of centripetal accelerations of P and Q will be:<br/>
Question 11 :
The kinetic energy of particle moving along a circle of radius, $R$, depends upon the distance covered, $S$, and is given by $K = aS$, where $a$ is a constant. Then, the force acting on the particle is<br/>
Question 12 :
A body of mass is moving in a circle of radius r with constant speed v.The force on the body is $mv^2/r$ and is directed towards the center.What is the work done by the force in moving the body half the circumference of the circle.
Question 13 :
A 50 kg passenger on an amusement park ride stands with his back against the wall of a cylindrical room with radius of 3 m. What is the centripetal force of the wall pressing in to his back, when the room spins and he is moving at 6m/s
Question 14 :
The motion of planets in the solar system is an exampIe of the conservation of
Question 16 :
A particle of mass $m$ is moving with constant velocity $\vec{v}$ on smooth horizontal surface. A constant force $\vec{F}$ starts acting on particle perpendicular to velocity $v$. Radius of curvature after force $F$ start acting is
Question 17 :
A satellite is in a circular orbit round the earth at an altitude $R$ above the earth's surface, where $R$ is the radius of the earth. If $g$ is the acceleration due to gravity of the earth the speed of the satellite is
