Question

Lan a train be safely driven
(22.16 m/s)
A string breaks under a tension of 10 kg-wt. If string is used to revolved a body of mass 12
in a horizontal circle of radius 50 cm, what is the frequency of revolution & linear speed with
gm
which a body can be revolved? (g = 9.8 m/s)
(20 34 rev/s, 63 95 m/s)
20 A piece of stone of mass 0.2 kg is tied to end of string 1 m long & whirled in a horizontal circle
about the other end of string If it performs 90 revolutions per minute. Calculate
1) angular velocity
2) centripetal acceleration
3) centripetal force
1) tension in the string
1942 rad/s, 88.76 m/s2,17.75 N, 17.75 N)
21. Acoin kept on a horizontal rotating disc has its centre at a distance of 0.25 m from axis of rotation
of disc. If = 0.2 find the angular velocity of disc at which the coin is about to slip off
236
(8-9.8 m/s
(2.8 rad/sec)
A body of mass 0.5 kg is whirled in a vertical circle at an angular velocity of 10 rad/s. If radius
of circle is 0.5 m, what is tension in the string when body is at
a) top of circle
b) bottom of circle
(20. N 29.9 N
A body of mass 1 kg is rotating in a vertical circle at the end of a string of length 1 m. calculate
difference of K.E at the top & bottom of circle 0904 (19.6 N)
24 The earth movs round the sun in an almost circular orbit radius 15x10km. Assuming motion
of earth to be UCM calculate
a) angular velocity b) linear velocity c) centripetal acceleration.
(a. 2x 10-rad/s b 3 x 10 m/s 6x10-
An object of mass 2 kg attached to a wire of length 5 m is revolved in a horizontal circle. If it
makes 60 rpm find.
a) its angular speed
b) Linear speed
c) centripetal acceleration
d) centripetal force
25
Samt​

Answer 1

Answer:

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Explanation:

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