Posted by **Ayanda** on Sunday, May 26, 2013 at 10:16am.

A vehicle with a mass of 1200 kg accelerates uniformly from rest upwards with an incline of 1:25 and reaches a speed of 72 km/h after 2 minutes,calculate:

1.The kineyic energy of the vehicle after 2 minutes

2.The potential energy of the vehicle after 2 minutes

- Engineering science -
**MathMate**, Sunday, May 26, 2013 at 10:48am
Hints:

Kinetic energy,

KE=(1/2)mv²

where

m=mass of object (kg)

v=velocity (m/s)

Potential energy

=mgh

m=mass in kg

g=acceleration due to gravity, m/s^{-2}

h=height above datum in m.

To calculate h, you need the distance travelled.

For uniform acceleration, distance d, is the average speed (72 km/h ÷ 2, converted to m/s) multiplied by the time (2 minutes, converted to seconds).

The height, h is then

h=d*slope = d/25 (for a 1/25 slope)

## Answer This Question

## Related Questions

- Physics - A costant force F iss applied to a crate of mass 25kg to move it ...
- physics - An object starts from rest and accelerates uniformly down an incline. ...
- Physics - A small aircraft takes off and accelerates for 1 min at the rate of 1....
- engineering science n3 - A train with a mass of 120Mg accelerates uniformly on a...
- Physics - A 2.84 kg block starts from rest at the top of a 30° incline and ...
- physics - A 3.00 kg block starts from rest at the top of a 30° incline and ...
- Physics - A 2.90 kg block starts from rest at the top of a 30° incline and ...
- Physics - A 2.90 kg block starts from rest at the top of a 30° incline and ...
- Physics 121 - A solid sphere of uniform density starts from rest and rolls ...
- science - An elevator in a high rise building accelerates and decelerates at the...

More Related Questions