Question

7.
A stone weighing 250 g is tied to a string of length 25 cm and whirled in a horizontal plane over the top
friction less table with a uniform speed. Find the maximum speed with which the stone can be whirled if the sta
can bear at most a load of 14.4 kgf. (take g = 10 ms-4)
(1) 10 ms?
(2) 11 ms 1 43742 ms!
(4) 13 ms]
A body of mass 500 gm revolves in a horizontal circle of radius 1 m at a speed 5 ms 1. Calculate the centrip
force acting on the body.
(1) 10 N7
1 2712.5 N
(3) 15 N
(4) 17.5 N
A particle of mass 'm' is executing uniform circular motion on a circular path of radius Y due to a continu
action of centripetal force F. Calculate its period of rotation.
NIM (6%).p65
(1) T = 27
27 27
(3) T = 27 m
(4) 5 - 1
An electron revolves around the nucleus in circular orbit. The necessary centripetal force develops from
(1) Nuclear force
(2) Electrostatic repulsive force
(3) Electrostatic attraction force
(4) Gravitational force
A satellite orbiting in a circular orbit acquires the necessary centripetal force from
(1) Electrostatic force 21 Gravitational force (3) Nuclear force (4) Magnetic force
10.
node08\2016-17\CBSE-201719th Advance\Phylo\62 S
11.
A force Facts on a stationary body for time t. The distance covered by the body S will be proportional to
(2)
2277​

Answer 1

11m143742ms!

15N

T=27m

Gravitational force

magnatic force

2277