An electric motor creates a tension of 4500 N in a hoisting cable and reels it at a rate of 2 m/s. Calculate the power of the motor. [Ans. 9 kW] A bomb explodes into two fragments of masses 2.0 kg and 1.0 kg. The total kinetic energy of the fragments is 3.0 J. Calculate (i) kinetic energy of the bigger fragment, (ii) momentum of the smaller fragment.
Answers
Answered by
1
power= force×velocity=4500×2=9000watt=9kW
Answered by
4
power = work done by the tension = 4500 N * 2 m/s
tension is able to move the cable ..causes displacement in the mass of cable at rate 2 m/s.. displacement = 2 * t... work done = 4500 N * 2 * t ..
Hope it helps you.
tension is able to move the cable ..causes displacement in the mass of cable at rate 2 m/s.. displacement = 2 * t... work done = 4500 N * 2 * t ..
Hope it helps you.
Similar questions