Physics 011
Chapter 1: Introduction
Quiz#:1B
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Kinetic
energy is given by the formula KE = 1/2 mv2, where m
is the mass and v is the velocity. The derived SI unit of
energy is the joule, J, which is equivalent to which combination of basic
units? |
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kg m2/s2 |
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g cm2/s2 |
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g m2/s2 |
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kg m/s2 |
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If
1 inch is equal to 2.5 cm, approximately how many inches are in 1000
kilometers? |
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2.5 x 104
in |
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4 x 104
in |
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2.5 x 107
in |
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4 x 107
in |
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A
marathon race is about 26 miles long. What is the length in kilometers? (1 km
= 0.623 mi.) |
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0.024 km |
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16 m |
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42 km |
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52 km |
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If a man is 6 foot 4 inches
tall, what is his approximate height in centimeters? (1 in. = 2.54 cm) |
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230 cm |
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190 cm |
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150 cm |
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120 cm |
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The
terminal velocity of a drop of water falling through the atmosphere is v =
(2/9) (r2 g p/n) where v is the velocity of the drop in
m/s; r is the radius of the drop in m; g is the
acceleration of gravity in m/s2 and p is the density of
water in kg/m3. What must be the units of n, the
coefficient of viscosity of the air through which the drop falls? |
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kg m/s |
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m s/kg |
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kg s2/m |
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kg/m s |
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