# A vehicle accelerates uniformly...

A vehicle accelerates uniformly from rest to a final velocity whilst ascending a gradient. There is frictional resistance to motion. Making use of D’Alembert’s principle and the parameters below, determine: i) the tractive effort between the wheels and the road surface ii) the work done in ascending the slope iii) the average power developed by the engine. Weight (N) 650 Velocity (km/h) 42 Time (s) 7 Gradient (degrees) 19 Frictional resistance (kN) 0.507 b) A space vehicle travelling at a steady velocity separates by a controlled explosion into two sections. The two parts carry on in the

same direction with the heavier rear section moving slower than the lighter front section. Determine the final velocity of each section. Velocity (m/s) 1005 Mass of heavy rear section (kg) 629 Mass of light front section (kg) 195 Speed of heavy rear section = 149 m/s slower than front section c) A lift cage accelerates upwards from rest to a final velocity whilst travelling a vertical distance. Assume no frictional resistance to motion. Making use of the principle of conservation of energy, determine: i) the work done ii) the tension in the lifting cable iii) the maximum power developed. Mass of lift cage (kg) 556 Final velocity (m/s) 5.3 Distance travelled (m) 12

can anyone help?
(edited 3 months ago)
Original post by sal_2k17
A vehicle accelerates uniformly from rest to a final velocity whilst ascending a gradient. There is frictional resistance to motion. Making use of D’Alembert’s principle and the parameters below, determine: i) the tractive effort between the wheels and the road surface ii) the work done in ascending the slope iii) the average power developed by the engine. Weight (N) 650 Velocity (km/h) 42 Time (s) 7 Gradient (degrees) 19 Frictional resistance (kN) 0.507 b) A space vehicle travelling at a steady velocity separates by a controlled explosion into two sections. The two parts carry on in the

same direction with the heavier rear section moving slower than the lighter front section. Determine the final velocity of each section. Velocity (m/s) 1005 Mass of heavy rear section (kg) 629 Mass of light front section (kg) 195 Speed of heavy rear section = 149 m/s slower than front section c) A lift cage accelerates upwards from rest to a final velocity whilst travelling a vertical distance. Assume no frictional resistance to motion. Making use of the principle of conservation of energy, determine: i) the work done ii) the tension in the lifting cable iii) the maximum power developed. Mass of lift cage (kg) 556 Final velocity (m/s) 5.3 Distance travelled (m) 12

can anyone help?

Hi, Welcome to TSR.
I hope you know that this is NOT a forum that will do your homework.
To start, what have you done?
And what are you stuck with?
I know my tutor just gave me this assignment which is due on Friday and i don't understand anything and i don't have her until Friday.
Original post by sal_2k17
... i don't understand anything and i don't have her until Friday.

When you said you don't understand anything, it would be better that you let us know if you have read the notes or have attended any lectures and be more specific about what you don't know instead of saying you don't know anything.

It would not be helpful if we just showed you what to do because you still need to know how to attempt such questions in the exam without our help.

Below are some links that may help you to acquire the necessary info.

D'Alembert's principle | Explained
https://youtu.be/215kHB8Fp20?si=qdcnQc2zQ_v0uOMg

Problem on D'Alembert's Principle for Lift in Motion
https://youtu.be/fAmjzrVdf0k?si=ggJhoiE_2NTvcizx

GCSE Physics - Momentum Part 1 of 2 - Conservation of Momentum Principle #59
https://youtu.be/F8DnNqBhUfQ?si=FcFplzb4K_zBJGVV

Conservation of Momentum Physics Problems - Basic Introduction
https://youtu.be/Fp7D5D8Bqjc?si=ODBejLtDQWFmUlFn

Energy conservation - solved example
https://youtu.be/O-9BXpHcOdQ?si=dyszD4DLiy78GqY6