Question

a) A 2.00 kg stone is whirled in a circle by a rope 4.00 m long,
completing 5 revolutions in 2.00 s. Calculate the tension in the
rope if the stone is rotated horizontally on a smooth frictionless
surface.

Input your answer in Newtons but do not include the unit in your
answer.

b) What is the centripetal acceleration of a locomotive that
travels around a circular curve of radius 250 m at a constant speed
of 70 km/h?Input your answer in m/s^{2} but do not input
units in your answer. Round to one decimal place.

c)A car, traveling at 25 m/s around a circular curve, has a
centripetal acceleration of 8.3 m/s^{2}. What is the radius
of the curve?

Input your answer in terms of meters but do not include the unit in
your answer. Round to the nearest meter.

d)When an object reaches terminal velocity it happens because the drag force is______the force due to gravity.

equal to

greater than

less than

Answer #1

a) Force F = 19719.2

b) Centripetal acceleration a_{c} = 19.6

c) Radius R = 75.3

d) Terminal velocity is reached when drag force is equal to the weight or force due to gravity.

Calculations is attached below,

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