A train consisting of 30 wagons each of mass 15 tonnes is pulled by an engine of power 90kW . If the frictional force and air resistive force offered per tonne of
![Emissions of nitrogen oxides and ammonia in 1995 at 50km resolution (tonnes of N per year) — European Environment Agency Emissions of nitrogen oxides and ammonia in 1995 at 50km resolution (tonnes of N per year) — European Environment Agency](https://www.eea.europa.eu/data-and-maps/figures/emissions-of-nitrogen-oxides-and-ammonia-in-1995-at-50km-resolution-tonnes-of-n-per-year/map4_5.ai/map4_5.eps.75dpi.gif/at_download/image)
Emissions of nitrogen oxides and ammonia in 1995 at 50km resolution (tonnes of N per year) — European Environment Agency
![Estimated nitrogen mass flows (tonnes N yr⁻¹). Arrows are color-coded... | Download Scientific Diagram Estimated nitrogen mass flows (tonnes N yr⁻¹). Arrows are color-coded... | Download Scientific Diagram](https://www.researchgate.net/publication/303956456/figure/fig2/AS:1132457424367617@1647010298098/Estimated-nitrogen-mass-flows-tonnes-N-yr-Arrows-are-color-coded-by-origin.jpg)
Estimated nitrogen mass flows (tonnes N yr⁻¹). Arrows are color-coded... | Download Scientific Diagram
![The logistic curve, with N 0 = 0.00039 tonnes, r = 0.73 year 21 ; K =... | Download Scientific Diagram The logistic curve, with N 0 = 0.00039 tonnes, r = 0.73 year 21 ; K =... | Download Scientific Diagram](https://www.researchgate.net/publication/258350751/figure/fig5/AS:669636999798799@1536665310804/The-logistic-curve-with-N-0-000039-tonnes-r-073-year-21-K-963200-tonnes-The.png)
The logistic curve, with N 0 = 0.00039 tonnes, r = 0.73 year 21 ; K =... | Download Scientific Diagram
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![SOLVED: 7. A railway coach of mass 50 tonne can exert a tractive force of 20 kN. Find the acceleration of the coach on a level track if the resistance is 150 SOLVED: 7. A railway coach of mass 50 tonne can exert a tractive force of 20 kN. Find the acceleration of the coach on a level track if the resistance is 150](https://cdn.numerade.com/ask_previews/d06b7e61-bbe2-4e9d-b4c2-0bc63194b5b2_large.jpg)
SOLVED: 7. A railway coach of mass 50 tonne can exert a tractive force of 20 kN. Find the acceleration of the coach on a level track if the resistance is 150
![Dynamic interrelationship between tonnes bought, tax and profit (N=69) | Download Scientific Diagram Dynamic interrelationship between tonnes bought, tax and profit (N=69) | Download Scientific Diagram](https://www.researchgate.net/publication/272342315/figure/tbl3/AS:1186821279088650@1659971651877/Dynamic-interrelationship-between-tonnes-bought-tax-and-profit-N69.png)
Dynamic interrelationship between tonnes bought, tax and profit (N=69) | Download Scientific Diagram
![Nitrogen solutions for food security amid fertilizer shortages and climate change | Nature Sustainability Nitrogen solutions for food security amid fertilizer shortages and climate change | Nature Sustainability](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41893-023-01167-9/MediaObjects/41893_2023_1167_Fig1_HTML.png)
Nitrogen solutions for food security amid fertilizer shortages and climate change | Nature Sustainability
![SOLVED: An engine of mass 50 tonnes pulls a train of mass 300 tonnes up an incline of 1 in 100. The train starts from rest and moves with a constant acceleration SOLVED: An engine of mass 50 tonnes pulls a train of mass 300 tonnes up an incline of 1 in 100. The train starts from rest and moves with a constant acceleration](https://cdn.numerade.com/ask_previews/42fbb2ba-9258-4962-8045-e34e37d47e3c_large.jpg)