16 Chapter 1 • Dynamics Exercise 1.2
1. Determine the units the following aremeasured in; 1.1 weight, and 1.2 mass.
2. Write down the equation for determining the weight of a body. 3. What is the value of gravitational acceleration on earth? 4. Describe in your own words the difference between mass and weight. 5. Approximately howmuch do you weigh? 6. What force will a body with amass of 5 kg exert on a table?
7. What will the tension in a rope be if a body with a mass of 16,5 kg was hanging on it?
8. A body has amass of 11 kg.What is its weight? 9. Themass of aman is 72 kg.What is his weight? 10. The weight of an object is 58,8 N.What is itsmass?
11. A force of 600 N is required to raise a certain object. What is themass of the object?
Exercise 1.3
1. Explain the difference between distance and displacement. 2. Write down the quantity and unit symbols for distance and displacement. 3. Define the term displacement.
4. Aman walks 80mwest, turns north and walks a further 110 m. He then turns east and walks 80 m.What is his displacement and how far did he walk?
5. Fig. 1.7 shows the dimensions of a pool table and the path followed by a pool ball.
Determine; 5.1 the displacement of the ball, and
5.2 the distance covered by the ball.
Fig. 1.7Fig. 1.7 (1,12 m; 3 m) Pool table 2,22 m (110 m; 270 m)
(49 N)
(161,7 N) (107,8 N) (705,6 N) (6 kg)
(61,23 kg)
1,5 m
1,5 m
1,12 m
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