Question

the following table gives the data about motion of a car time 11.00 11.30 in 12.00 12.30 1.00 distance 0 30 30 6500 find the speed of a car between 12.00 hours in 12.30 hour what is the average speed of the car is a motion an example of uniform motion justify

Answer 1

The data for this question should be as follows: 

Time in hours:     11.00   11.30     12.00    12.30    1.00

Distance in Km :     0         30          30        65        100 

i) The speed of the car at 12:00 hours and 12:30 hours

Speed = distance traveled / time taken

Distance traveled =  65 - 30 = 35 kilometers 

Time taken = 12:30 hours - 12:00 hours = 30 minutes = 0.5 hours

Therefore the speed = 35 km / 0.5 hours = 350/5 = 70 km/hr

∴ The speed of the vehicle between 12:00 hours and 12:30 hours is 70km/hr

ii) Is the speed of the car an example of uniform speed?

A body is said to have a uniform speed when its speed remain constant, that is, not changed over the course of its movement. This means that the body covers same distance over equal intervals of time.

In the data above, it is clear that the car covers varied lengths of distances over the 30 minutes interval. This therefore means that the vehicle does not have a uniform speed. 

Answer 2

Answer:

1. The speed of between the given hours is 70KM/H

2.Vehicle does not follow the concept of the uniform speed.

Step-by-step explanation:

To find the speed between the given hours need to put the values in the formula:total distance/Time duration

Given: The time is between 12:00 to 12:30 PM and the speed is traveled 30 to 65 km.

To find:

1. Speed between the given time slot:

Total time: 12:00 -12:30= 30min

Convert 20 min in hours is 0.5 hourr

Total distance: 30-65=35KM

Speed=35/0.5= 70KM/H

2. Vehicles does not follow the uniform speed because the vehicles speed is changed time by time when the vehicle is on the road.

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