Question

A bus traveling at 8 m/s east has a constant increase in speed of 1.5 m/s2. What is its

Answer 1

The velocity of the bus after 6.8 secs later will be ; 16.7 m/s

Given data:

Initial speed = 8 m/s

Increment speed = 1.5 m/s

Total time travelled = 6.8 s

Determine the final velocity after 6.8 secs

After 1 sec : speed = 8 m/s

After 2 secs : speed = 8 + 1.5

After 3 secs :  speed = 8 + 1.5 + 1.5

After 4 secs : speed = 8 + 1.5 + 1.5 + 1.5

After 5 secs : speed = 8 + 1.5 + 1.5 + 1.5 + 1.5

After 6 secs : speed = 8 + 1.5 + 1.5 + 1.5 + 1.5 + 1.5 =  15.5 m/s

∴ After 6.8 secs : speed = 15.5 + [ ( 1.5 / 10 ) * 8 ] = 16.7 m/s

Hence we can conclude that the velocity of the bus after 6.8 secs is 16.7m/s

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