Question

define uniform acceleration and write its SI unit a bus travel the first 20 km in 1 hour next 20 km and half hour and next 20 km in 1 hour calculate the average speed of bus

Answer 1

Answer:-

$A_v = 24 km/hr$

Explanation:-

Uniform acceleration → When a body change it's velocity with equal amount in equal interval of time then it is said to be in uniform acceleration.

• The object during free fall goes to an uniform acceleration.

The SI unit of uniform acceleration is m /s².

Average speed → It is defined as the ratio of the total distance travelled by a body to the total time taken during its whole journey.

Mathematically it is expressed as :-

→$A_v = \dfrac{\text{Total distance travelled}}{\text{Total time taken}}$

→$A_v = \dfrac{20 + 20 + 20}{1 + \dfrac{1}{2}+ 1}$

→$A_v = \dfrac{60}{\dfrac{2+1+2}{2}}$

→$A_v = \dfrac{60}{\dfrac{5}{2}}$

→$A_v = \dfrac{120}{5}$

→$A_v = 24 km /hr$

hence,

The average speed of bus is 24 km/hr.