Phys 201 exam 1 solutions

# Phys 201 exam 1 solutions - Name Section TA Physics 201...

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Name: ____________________________________________ 1 Section #_________ TA:______________ Physics 201 Fall 2009 Exam 1 September 29, 2009 Acceleration due to earth’s gravity g=9.8 m/s 2 1. The density of seawater was measured to be 1.07 g/cm 3 . This density in SI units is A) l.07 × 10 –3 kg/m 3 B) (1/1.07) × 10 3 kg/m 3 C) 1.07 × 10 3 kg D) 1.07 × 10 –3 kg E) 1.07 × 10 3 kg/m 3 2. To convert a quantity from km/h to m/s, you must 3. If x and t represent distance and time, respectively, the C in x = 1 / 2 Ct 2 must A) have the dimensions ML / T 2 . B) have the dimensions M. C) have the dimensions L/T 2 . D) have the dimensions L 2 / T 2 . E) be dimensionless.

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Name: ____________________________________________ 2 4. In Newton's Law of Gravity the universal gravitational constant G = Fr 2 / m 1 m 2 , where F is the gravitational force between the two masses, m 1 and m 2 , and r is the distance between them. What are the dimensions of G ?
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