A train of mass 1600 kg attains a speed of 25 ms\(^{-1}\)...
A train of mass 1600 kg attains a speed of 25 ms\(^{-1}\) in 20 seconds. The power developed in the engine is?
2.5 KW
80 KW
25 KW
50 KW
Correct answer is D
where force = f, mass = m, acceleration = a, velocity = v, time = t
Force = m * a → m * \(\frac{Δv}{t}\)
Power = f * v
P = m * \(\frac{v}{t}\) * v = m * \(\frac{v^2}{t}\)
p = \(\frac{1600 * 25^2}{20}\)
p = 50,000 or 50 KW
Which of the following waves can propagate through a vacuum? ...
The specific latent heat of vapourization of lead is 8.7 × \(10^5 Jkg_1\). This means that 8.7...
The total power drawn from the cell in the circuit above is ...
What type of wave is emitted by a loud speaker? ...
The region around a magnet in which the magnetic influence is experienced is called ...