Question

# a) A 2.00 kg stone is whirled in a circle by a rope 4.00 m long,...

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.

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/s2 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/s2. What is the radius of the curve?

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

a) Force F = 19719.2

b) Centripetal acceleration ac = 19.6

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

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