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92science_physics

# 92science_physics - 100 2 1 A nanosecond is a 109s b 103s...

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9. The system shown remains at rest. The force of friction on the upper block is: a) 4N b) 8N c) 12N d) 16N e) 20N w=20N a=3 m b=4 m 10. Which of the following is NOT a correct unit for work ? a)erg b)ft lb c)watt d)newton meter e)joule 11. A 2-kg particle on the end of an ideal spring is pulled out 0.5m and released from rest. The spring constant is 200 N/m. When the particle passes the point where the spring force is zero its speed is a) 0 b) 0.05m/s c) 5 m/s d) 10m/s e) 100m/s 12. A kilowatt hour is a unit of : a) power b)energy/time c) work d) power/time e) force/distance
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92science_physics - 100 2 1 A nanosecond is a 109s b 103s...

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