A0.160 kg ball attached to a light cord is swung in a vertical circle of radius 70.0 cm. at the top of the swing, the speed of the ball is 3.26 m/s. the centre of the circle is 1.50 m above the floor.
calculate the speed of the ball when the cord is 30.0̊ below the horizontal.

The speed of the ball is 5.59 m/s.

Explanation:

Given that,

Mass = 0.160 kg

Radius = 70 cm =0.70 m

Distance = 1.50

Speed at top = 3.26 m/s

Angle = 30.0°

We need to calculate the speed of the ball

The total energy at the top

The final kinetic energy of ball at that point when the cord is 30° below the horizontal

Using conservation of energy

Hence, The speed of the ball is 5.59 m/s.

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

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