Datasheet

Chapter 1: Mechanical Adjustments · Page 39
10. What's the British Engineering unit of mass?
11. How does force relate to mass and acceleration?
12. What's the acceleration due to gravity in SI units?
13. What is an object's weight in terms of its mass and the earth's gravity?
14. How do you apply a conversion factor to a quantity whose units you want to
convert?
15. What's a free body diagram?
16. Should a free body diagram of a block show the surface it's sliding on?
17. What does ΣFy mean?
18. What is kinetic friction?
19. What is a coefficient of static friction?
20. How do you calculate the coefficient of kinetic friction?
21. What's a normal force?
22. How can different coefficients of frictions indicate different frictional forces,
given the same weight?
Exercises
1. Write a block of code that makes your SumoBot travel in a path that curves to
the left indefinitely.
2. Modify Forward100Pulses.bs2 so that it makes the SumoBot go forward 200
pulses instead.
3. If a SumoBot's wheel makes 9.25 revolutions in 10 seconds, calculate the
wheel's rotational speed in RPM.
4. If a particular piece of code slows the servo's speed from 60 to 50 RPM,
calculate the percent speed reduction.
5. Calculate the weight of a 450 g SumoBot in newtons.
6. Calculate the weight of a 475 g SumoBot in newtons.
7. Calculate the SI mass of a SumoBot that weighs 17.12 oz.
8. Calculate the SI mass of a SumoBot that weighs 17.46 oz.
9. Calculate the force it takes to start a 10 lb rubber object sliding along a level
concrete sidewalk.
10. Calculate the force it takes to start a 5 kg rubber object sliding along a level
concrete sidewalk.
11. Calculate the force it takes to start an 8 oz steel object sliding along a level
copper surface.
12. Calculate the force it takes to start a 100 lb block of ice sliding across a frozen
lake.