A woman starts from her home at 9.00 am, walks with a speed of 5 km h-1 on a straight road up to her office 2.5 km away, stays at the office up to 5.00 pm, and returns home by an auto with a speed of 2.5 km h-1. Choose suitable scales and plot the x-t graph of her motion.
class 11 physics motion in a straight line question
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Explanation:
Speed of the woman = 5 km/h
Distance between her office and home = 2.5 km
Time taken = Distance / Speed
= 2.5/5=0.5 h=30 min
It is given that she covers the same distance in the evening by an auto.
Now, speed of the auto =25 km/h
Time taken = Distance / Speed
= 2.5/25=1/10=0.1 h=6 min
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