Question

A mobile starts from rest after 20 s reaches a speed of 90 km / h determine its speed and distance traveled​

Answer 1

We first apply the data to the problem.

Data:

`\bold{V = 90km/h}`

`\bold{T = 20s}`

`\bold{D = ?}`

Now, we convert km/h to m/s.

Conversion:

`\bold{90km/h * (1000m/1km) * (1h/3600s)}`

`\boxed{ \boxed{ \bold{V = 25m/s}}}`

Then, we apply the formula that is.

Formula:

`\bold{D = V * T}`

To determine the distance traveled we develop the problem.

Developing:

`\bold{D = (25m/s) * (20s)}`

`\boxed{\boxed{ \bold{D = 500m}}}`

Its speed is 25 meters per second and the distance traveled is 500 meters.