he following table gives the data about motion of a car.Time (h) 11.00 11.30 12.00 12.30 1.00Distance(km)0 30 30 65 100Plot the graph.(i) Find the speed of the car between 12.00 hours and 12.30 hours.(ii) What is the average speed of the car?(iii) Is the car’s motion an example of uniform motion? Justify
Question
he following table gives the data about motion of a car.Time (h) 11.00 11.30 12.00 12.30 1.00Distance(km)0 30 30 65 100Plot the graph.(i) Find the speed of the car between 12.00 hours and 12.30 hours.(ii) What is the average speed of the car?(iii) Is the car’s motion an example of uniform motion? Justify
Solution
(i) The speed of the car between 12.00 hours and 12.30 hours can be calculated using the formula:
Speed = Distance / Time
The distance covered between 12.00 and 12.30 is 65 - 30 = 35 km. The time taken is 0.5 hours.
So, Speed = 35 km / 0.5 h = 70 km/h
(ii) The average speed of the car can be calculated using the formula:
Average Speed = Total Distance / Total Time
The total distance covered is 100 km. The total time taken is 2 hours (from 11.00 to 1.00).
So, Average Speed = 100 km / 2 h = 50 km/h
(iii) The car's motion is not an example of uniform motion. Uniform motion is when an object covers equal distances in equal intervals of time. In this case, the car covers different distances in equal intervals of time (30 km in the first half hour, 0 km in the next half hour, 35 km in the next half hour, and 35 km in the last half hour). Therefore, the car's motion is not uniform.
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