Friday

August 22, 2014

August 22, 2014

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

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 10:48amHints:

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)

**Related Questions**

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....

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 ...

science - An elevator in a high rise building accelerates and decelerates at the...

Physics - An electric vehicle starts from rest and accelerates at a rate of 2.3 ...

Physics - An electric vehicle starts from rest and accelerates at a rate of 3.0 ...

Engineering science - A lorry has a mass of 5640kg and accelerates uniformly ...

Science-Physics - 20 (part 1 of 2) The initial speed of a body is 6.61 m/s. What...