PHYS2205 -Practice Test 2
1. The second hand on a watch has a length of 4.50 mm and makes one revolution in 60.00
s. What is the speed of the end of the second hand as it moves in uniform circular
motion?
A) 9.42 × 10−4 m/s D) 4.71 × 10-4 m/s
B) 2.67 × 10−3 m/s E) 2.36 × 10−5 m/s
C) 5.34 × 10−3 m/s
2. A flywheel is initially roatating at 20 rad/s and has a constant angular acceleration.
After 9.0 s it has rotated through 450 rad. Its angular acceleration is:
A) 3.3 rad/s B) 4.4 rad/s C) 5.6 rad/s D) 6.7 rad/s E) 11 rad/s
3. A wheel initially has an angular velocity of 18 rad/s but it is slowing at a rate of 2.0
rad/s2. By the time it stops it will have turned through:
A) 81 rad B) 160 rad C) 245 rad D) 330 rad E) 410 rad
4. The fan shown has been turned on and is slowing as it rotates clockwise. The direction
of the acceleration of the acceleratrion point X on the fan tip could be:
A) B) C) ↓ D) ← E) →
5. A flywheel of diameter 1.2 m has a constant angular acceleration of 5.0 rad/s2. The
tangential acceleration of a point on its rim is:
A) 5.0 rad/s2 B) 3.0 m/s2 C) 5.0 m/s2 D) 6.0 m/s2 E) 12 m/s2
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