PHY2053 Physics 1, Test 2 Practice Problems - In the...

In the figure, a mass of 37.98 kg is attached to a light string that is wrapped around a cylindrical spool of
radius 10 cm and moment of inertia The spool is suspended from the ceiling, and the mass is
then released from rest a distance 4.00 m above the floor. How long does it take to reach the floor?
A) 4.32 s B) 3.07 s C) 0.950 s D) 2.93 s E) 6.09 s
In the figure, a ladder of weight 200 N and length 10 meters leans against a smooth wall (no friction on
wall). A firefighter of weight 600 N climbs a distance x up the ladder. The coefficient of friction between
the ladder and the floor is 0.5. What is the maximum value of x if the ladder is not to slip?
Suppose you are sitting on the outer edge of a rotating device that is 18 m in diameter. If the device