Posted by **Faiz** on Friday, August 15, 2014 at 2:30pm.

The speed of the train is reduced from 36 km per hour to 9 km per hour whilst it travels a distance of 150 metres,if the retardation be uniform,find how much further it will travel before coming to rest

- Physics -
**Henry**, Friday, August 15, 2014 at 4:56pm
Vo = 36km/h = 36,000m/3600s = 10 m/s.

V = 9km/h = 9000m/3600s = 2.5 m/s.

a = (V^2-Vo^2)/2d

a = (2.5^2-10^2)/300 = -0.3125 m/s^2.

d = (V^2-Vo^2)/2a

d = (0-2.5^2)/-0.6250 = 10 m. Further.

- Physics -
**Henry**, Thursday, October 30, 2014 at 10:09pm
Or:

d = -(10^2)/-0.6250 = 160 m.

160 - 150 = 10 m. Further.

## Answer This Question

## Related Questions

- physics - the speed of train is reduced from 60km/h at the same time as it ...
- math - A commuter train travels the distance from Acton to Boston in 1 hour and ...
- math - A computer train travels the distance from Acton to Boston in 1 hour and ...
- math - substitute to find the value of the expression. A train must cover a ...
- Maths - A train travels from city A to city B. It leaves A at 11:15 AM and ...
- Algebra 1 - a train leaves a city heading west and travels at 50 miles per hour...
- maths - A motorist travels 120 miles to his destionation at an average speed of ...
- math - Ellen works for a high-speed rail company that wants to develop a new ...
- Math Algebra - A quick question to check my answer. Trains A & B are travelling ...
- Physics - The Speed of train is reduced from 60km/h at the same time as it ...

More Related Questions