1.

a stone is tied to the end of astring 100cm long is whirled in ahorizontal circle qith a constant speed . if the stone makes 20 revolution in 40s,what is the mag itude and direction of acceleration of the stone

Answer»

Answer:

FREQUENCY F=

25

14

Hz

Angular velocity ω=2πf=

25

2×14π

rad/s=3.52rad/s

Acceleration is a=ω

2

r=3.52

2

×0.8=9.9m/s

2

The direction is ALONG the radius at every point towards the centre.



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