Chapter 8 Rotational Motion
Rigid Body a body with a denite shape that doesnt change, so that the particles
composing it stay in xed positions relative to one another.
Purely Rotational Motion 7 all points in the body move in circles and the ce
Name (prim) Lecture time i195 "'2 i
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Instructions: There are 10 problems in this test; check for completeness. Read every question carefully before you attempt
to solve i
A vertical dumbwaiter elevator system is connected by a pulley
system to a motor, as shown in the gure. The motor raises and
lowers the durnbwaiter. The mass of the dumbwaiter is 200 kg. In
operation, it moves at a speed of 0.5 mfs upward without
The position vs. time curves for various lD motion
scenarios are shown inthe gure. Which curve or
curves correspond to situations with zero
(a) Curve (b) only. (0) Both curves (b)
(b) Curve (e) only. (1) Curve
General information and instructions: On the blank Scantron sheet, (1) print and bubble in your
name where indicated in the upper right corner', then (2) do the same with your ID number
where indicated near the top left; then (3) bubble in your test versi
La b 15' Temperature a nd Heat
Objective: is to u ndersta nd the concept oFspeciFic heat and to measure the speciFic heat onater.
temperatu re measured with thermometer (thermo-hot, metermeasure), when the
correspondence between the lengths oFthe column a
Useful constants: pwateFIOOO kg/m3, g:9.8 mlsz, 1 hp : 746 W, l m : 100 cm, 1 km :
1000 m, lkg : 1000 g (grams)
Answer Key at End
Choose the most nearly correct answer.
1. A baseball of mass 0.1 kg and a bowling ball of mass 1.5 kg collide head on.