1. 2 mm means...
2. The sum of two or more significant figures...
3. How many significant digits are there in the significant figure 0.000756
4. How many significant digits are there in the significant figure 2000.0
5. The product of the significant figures 21.2 and 80 gives the significant figure
6. Express 0.5 in standard notation
7. Use dimensional analysis to determine which of the following equations is dimensionally correct
8. Converting 3 mm is equal to...
9. 9 g ⁄ cm 3 is equal to...
10. One of the legs of a right angled triangle is 70 m long. The angle between this leg and the hypothenus is 10 degrees. Calculate the length of the other leg.
11. A physical quantity that represents displacement per a unit time is called...
12. Consider the number line shown. Each unit is 1 cm. Particle 1 is displaced from point B to point F and particle 2 is displaced from point D to point A. The displacements of particles 1 and 2 respectively are...
13. A particle is displaced from the point x = 9 cm to the point x = 15 cm. And then it is displaced back to the point 8 cm. Determine its displacement and the distance it travelled respectively.
14. The following is the graph of position versus time for a certain particle. Calculate the average velocity between the 8 th and the 14 th seconds.
15. The following is the graph of position versus time for a certain particle. Calculate the instantaneous velocity after 3 seconds.
16. The following is the graph of velocity versus time for a certain particle. Calculate its average acceleration for the first 8 seconds.
17. A particle, starting from a certain speed, was accelerated for 7 seconds to a speed of 11 m ⁄ s with an acceleration of 0.9 m ⁄ s 2. Calculate its initial speed.
18. The speed of a particle moving with a uniform acceleration of 25 m ⁄ s 2 changed from 30 m ⁄ s to 41 m ⁄ s. How far did it travel?
19. The speed of a particle changed from 22 m ⁄ s to 60 m ⁄ s in 20 seconds with a uniform acceleration. Calculate the acceleration and the distance travelled respectively.
20. A particle, starting from a speed of 60 m ⁄ s, accelerated for 18 seconds with a uniform acceleration of 4 m ⁄ s 2. The distance travelled and its final speed respectively are...
21. An object released from a certain height took 20 seconds to heat the ground. The height and its velocity just before it hits respectively are
22. The default angle (angle measured with respect to the positive x-axis) for the vector A = 2 m east is...
23. If the vector A = 130 m ⁄ s west, using the scale 1 cm for 40 m ⁄ s, the vector -0.5A can be graphically represented by an arrow of length _________ and default angle (angle measured with respect to the positive x-axis) ___________.
24. Determine the x and y components of the vector A = 990 m 80 deg south of west.
25. Calculate the magnitude and direction (with respect to the positive x axis) of a vector whose x and y components are -12 m and 21 m respectively.
26. Given the vectors A = 50 m 50 deg north of east and B = 20 m 20 deg north of west, find the x and y components of their sum vector A + B.
27. Which of the following statements is not correct?
28. A particle is displaced from the point ( -4 m, -40 m ) to the point ( 9 m, -70 m ). Calculate the horizontal component of its displacement vector.
29. A bullet is fired horizontally from a 10 m tall building with a speed of 1500 m ⁄ s. How far (horizontally) will it fall?
30. A bullet is fired from the ground making an angle of 80 deg with the horizontal with a speed of 1200 m ⁄ s. How far (horizontally) will it fall?