A body of mass 4kg is moving up an inclined plane rising 1in 40 with velocity 40 m/s if efficiency is 50% the calculate power required
1)38.4W
2)55W
3)78.4W
4)108w

A block of mass 4 kg is pulled along a smooth inclined plane of inclination 30^(@) with constant velocity 3 m/s as shown, power delivered by the force is

A body of mass 2 kg moving with a velocity 3 m//s collides with a body of mass 1 kg moving with a velocity of 4 m//s in opposite direction. If the collision is head on and completely inelastic, then

A particle of mass 2 kg is moving with SHM. Its greatest velocity is 40 ms^(-1) and its amplitude is 20m. Find the time period and the force of attraction towards the centre when the particles is at its greates distance. Hint : Maximum velocity , A omega = 40ms^(-1) ,A = 20 cm , find omega . Then find T= ( 2pi)/( omega) Force of attractino towards centre = Restoring force = m omega^(2) A

An engine pumps 373 kg of water upto height of 16 m in 40 seconds. Rated power of engine if its efficiency is 80% is (1 horse power = 746 W and g =10 m/ s^2 )

A wheel of mass M and radius a and M.I. I_G (about centre of mass) is set rolling with angular velocity omega up a rough inclined plane of inclination theta . The distance traveled by it up the plane is

In a series LCR circuit, the total reactance is 4 Omega and resistance is 3 Omega . Its power factor is

Calculate Molarity of 40% NaOH (w/W). The density of solution is 1.2 g/ml.

Calculate Molarity of 40% NaOH (w/W). The density of solution is 1.2 g/ml.

If the power dissipated in the 27 Omega resistor in the circuit shown is 108 watt, the potential difference across the 4 Omega resistor is

Calculate the molarity of 40 % (w/w) NaOH solution, if the density of the solution is 1.5ml