3. During the journey by a car, odometer readings at different times are given below.
Time (in minutes) > 12:00 12:15 12:30 12:45 1:00
Odometer reading (in km) - 7810 7840 7870 7900 7930
taj Plot distance-time graph for a moving car. 57
(b) What is the kind of motion of the car?
(c) Calculate the speed of car in to km/h) () m/s *
Answers
Answer:
let me explain with example:-
example:-The odometre of a car reads 57321.0 km whenthe clock shows the time 8:30am . what is the distance moved by the car . if at 8:50 am the odometer reading has changed to 57336.0km ?calculate the speed of the car in km/min during this time. Express the speed in km/hr also
Explanation:
Odometer initial reading : 57321 km
Odometer final reading :57336 km
Distance covered : 57336-57321 km
= 15 km
Time taken : 8:50-8:30
= 20 min
Formula :
Speed = Distance/Time
= 15/20
= 3/4 km/min
in km/hr→
= 3/4 * 60
= 45 km/hr
OR
initial reading equal to 57321 0.0
final reading = 273 6.0 km
initial time 8:30 a.m.
final time 8:50 a.m.
Total distance covered by car equal to 5 7 3 2 1 - 5 7 3 3 6 =15
total time equal to 8: 30 - 8:50 equals to 20 minutes
speed equal to distance upon time so 15/20=0.75km/m
speed in km/hr =0.75*60=45 km/h
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answer
HOPE THIS EXAMPLE SHOWS YOU THE RIGHT WAY