The distance-time table for a car is given.

Time
Distance (km)
7.00 p.m
0
7.15 p.m
5
7.30 p.m
10
7.45 p.m
15
8.00 p.m
20
8.15 p.m
25
8.30 p.m
25
8.45 p.m
25
9.00 p.m
29
9.15 p.m
33
9.30 p.m
37
9.45 p.m
45
10.00 p.m
55
 
Answer the following questions:
(a)Plot the graph of the distance travelled with time.
(b)Which portion of the graph shows that the motion of the car is non-uniform?
(c)Which portion of the graph shows that the car is at rest?
(d)Which portion of the graph shows that the motion of the car is uniform?
(e)Calculate the speed of car during uniform motion.

Asked by Topperlearning User | 15th Jun, 2016, 11:20: AM

Expert Answer:

a) To plot the graph, take time on X-axis and distance on Y-axis. Choose the appropriate scale for the graph.


(b) Region CD represents the non-uniform motion of the car.
(c) Region BC represents the car at rest.
(d) Region AB represents the uniform motion of the car.
(e)The slope of line AB gives the speed of car during uniform motion

begin mathsize 12px style Speed equals fraction numerator 25 space minus space 0 over denominator 1 space straight h space 15 space min end fraction fraction numerator 25 space km over denominator 1.25 space straight h end fraction equals 20 space km divided by straight h end style

Answered by  | 15th Jun, 2016, 01:20: PM

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