Review Set 1
Phys 1L03
Questions for REVIEW
1.
How many significant figures should be written in the sum of 7.56 mm + 549.165
mm + 20.048 mm + 9702.0098 mm
Ans: 1027.88
(6 sig.figs.)
2.
A thunderstorm drops 7.0 cm of rain on city that covers an area of 32 km by 45 km.
Estimate the number of raindrops that fell during the storm. You may assume the
diameter of a raindrop to be 2 mm.
Ans: 10
16
3.
An object is thrown vertically upward. Which of the following statements is true?
a. Its velocity changes non uniformly
b. Its max height is independent of the initial velocity.
c. Its velocity changes with constant rate.
d. Its travel time upward is slightly greater than its travel time downwards
e. The velocity on returning to its starting point is the same as its initial
velocity.
•
Ans: ‘c’
4.
A graph of
x
versus
t
(position vs.
time) for a particle in straightline
motion is shown below. The average
acceleration of the particle between
t =
1.5 s
and
t = 6.5 s
is:
•
a
aveg
= [(v
2
v
1
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 Spring '11
 HUGHES
 Physics, Acceleration, Friction, 2 mM, 7.0 cm, aaveg

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