The diagram above illustrates a waveform. Which of the point on the waveform are in phase?
A. P and R B. R and T C. P and T D. Q and S Correct Answer: Option D D. Q and SThe outlet of a bicycle pump is used to inflate a football as illustrated in the diagram above. Why does the pressure of the air inside the pump increases as the pimp handle is slowly pushed downward at constant temperature?
A. momentum of the air molecules are increased B. volume occupied by the molecules is increased C. frequency of collision of the air molecules with the walls of the pump is increased D. more air molecules collide with one another in the system Correct Answer: Option C...Four co-planar forces of magnitudes 10N, 17N, 6N and 20N act at point O as shown in the above diagram. Determine the magnitude of the resultant force?
A. 53.N B. 21.0N C. 7.0N D. 5.0N Correct Answer: Option D D. 5.0N Explanation Vertical resultant = 10 – 6 = 4N Horizontal resultant = 20 – 17 = 3N R = √3²+4² = 5NA block of wood of mass 5kg is pulled on a platform by a force of 40N as illustrated in the diagram above. If the frictional force, F experienced by the block is 12N, calculate the magnitude of the acceleration of the block?
A. 2.4ms‾² B. 5.6ms‾² C. 8.0ms‾² D. 2.4ms‾² Correct Answer: Option B B. 5.6ms‾² Explanation F + Ma = P a = P−F/m = 40−12/5 = 5.6ms‾²Products
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