Answer:
It will always have a zero acceleration
Net centripetal force is given by the product of mass and centripetal acceleration
Here we know that
mass (m) = 20 kg
speed (v) = 10 m/s
radius (R) = 15 m
So here we can say that centripetal acceleration is given as
now from the formula of force
<em>so correct answer would be 133 N</em>
The airplane's speed relative to the ground is
√ (100² + 25²)
= √ (10,000 + 625)
= √ 10,625
= 103.08 km/hr .
The angle of its velocity north of west is
the angle whose tangent is (25/100)
arctan(25/100) = 14° north of west .
(bearing = 284°)
There's not enough information given to answer the question.
The speed depends on the kinetic energy of the bob at the bottom of
the first swing.
THAT depends on how high above its 'resting' position it was before
it was released, and THAT depends on how long the string is and
how far to the side you pulled it before you let it go.