Work and time, speed & Distance

In the following questions, which of them vary directly and which vary inversely with each other and which are neither of the two? (i) The time taken by a train to cover a fixed distance and the speed of the train. (ii) The distance travelled by CNG bus and the amount of CNG used. (iii) The number of people working and the time to complete a given work. (iv) Income tax and the income (v) Distance travelled by an auto-rickshaw and time taken

Classify the following as scalars and vectors : Time Distance Displacement Force Work Torque Velocity Speed Acceleration Mass

Problems based on time distance and speed

A bus is moving with a uniform speed travelling a certain distance in a certain time. The speed of the bus is directly proportional to the distance travelled and inversely proportional to the square root of time. It travels is 60 km in 4 hours at a speed of 40 km/h. Then find how much distance will travel in 9 hours at a speed of 44 km/h?

When the speed is kept fixed, time and distance vary inversely with each other

In unit of time is taken as one year and the unit of speed is taken as the speed of light, then the unit of distance (length) is known as