A heavy mass spins in a horizontal circle with a radius of 1

A heavy mass spins in a horizontal circle with a radius of 15.0 cm. The rotations are timed and the amount of time it takes for it to go around once is 0.56 s. The centripetal force is measured to be 6.1 N. According to this experiment, the speed of the bob is closest to: The direction of the velocity of the bob is: The acceleration of the bob is closest to: The direction of the acceleration of the bob is: According to this experiment, the mass of the bob is:

Solution

Here,

radius , r = 15 cm = 0.15 m

T = 0.56 s

Fc = 6.1 N

101.

let the speed of the bob = (2pi/T * r

speed of the bob = (2pi/.56) * 0.15

speed of the bob = 1.7 m/s

option c)

102.

the direction of velocity of the bob is

a) Tangent to the circle.

103.

acceleration = v^2/r

acceleration = 1.7^2/.15

acceleration = 19 m/s^2

option d) 19 m/s^2

104.

as the centripetal acceleration is towards the centre

the direction of bob is

b) inwards