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The figure below shows a velocity-time graph of a particle moving along a West-East straight line, with velocity considered positive eastwards.
Use the graph to answer the following questions:
(a) Find the velocity of the particle:
(i) after 5 seconds.
(ii) after 15 seconds.
(iii) after 20 seconds.
(iv) after 40 seconds.
(b) Find the acceleration of the particle:
(i) during the first 5 seconds.
(ii) during the #15^(th# second of the motion.
(iii) between the #18^(th# and the #20^(th# second.
(iv) between the #37^(th# and the #41^(st# second.
(c) Use area under the graph to find the distance covered by the particle:
(i) between the #10^(th# and the #15^(th# second.
(ii) between the #25^(th# and the #35^(th# second.
(iii) between the #20^(th# and the #25^(th# second.
(d) Find the average velocity:
(i) during the period from the #10^(th# to #15^(th# second.