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Question Description
problems
1. What are the three basic physical quantities and their units?
2. Convert 325.8 gram into kilogram and milligram.
3. Write the following numbers in scientific notation: 2,100; 6,500,000; 0.00012.
4. Knowing 1 ft=12 inch and 1 inch = 2.54 cm, 1 m = _______________ ft.
5. Convert the speed of 60 mph to the corresponding speed with units km/h and m/s, respectively.
1. A walker covers 1.8 km in a time of 30 minutes. What’s his average speed in m/s?
2. A car ran at a speed of 20 m/s for 10 minutes. What’s the distance it traveled?
3. A train achieves a velocity of 30 m/s from rest in 2 seconds. What’s its acceleration?
4. A car travels with an initial velocity of 12 m/s and acceleration of 2.5 m/s2 for a time of 2 seconds.
a) What’s its speed at the end of this time?
b) What distance does it travel during this time?
5. A car is moving at velocity V0=30 m/s. It starts to slow down with an acceleration -2m/s.
a) How long will it take to stop?
b) What distance does it travel during this time?
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