quiz3Aa

quiz3Aa - Physics 1A- 8 AM class Quiz # 3 Nov. 16, 2007...

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Physics 1A- 8 AM class Quiz # 3 Nov. 16, 2007 Prof. Jose Onuchic MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A spring with a spring constant of 400 N/m is compressed 2 cms. How much energy does it store? A) 0.02 J B) 0.42 J C) 5.60 J D) 0.08 J E) 1.22 J 2) A 20-N crate starting at rest slides down a rough 5.0-m long ramp, inclined at 25 o with the horizontal. 20 J of energy is lost to friction. What will be the velocity of the crate at the bottom of the incline? A) 0.98 m/s B) 1.9 m/s C) 3.2 m/s D) 4.7 m/s E) 6.0 m/s Figure 1 3) In Figure 1, A 9.0-kg hanging weight (B) is connected by a string over a pulley to a 5.0-kg block (A) sliding on a flat table. If the coefficient of sliding friction is 0.20, find the tension in the string. A) 19 N B) 24 N C) 32 N D) 38 N E) 45 N 4) A 2 000-kg ore car rolls 50.0 m down a frictionless 10 o incline. If there is a horizontal spring at the end of the incline, what spring constant is required to stop the ore car in a distance of 1.00 m?
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This note was uploaded on 04/08/2009 for the course PHYS 1A taught by Professor Onuchic during the Fall '07 term at UCSD.

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quiz3Aa - Physics 1A- 8 AM class Quiz # 3 Nov. 16, 2007...

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