Akash bought vegetables weighing 10 kg. Out of this, 3 kg 500 g is onions, 2 kg 75 g is tomatoes and the rest is potatoes. What is the weight of the potatoes?

Ravi purchased 5kg 400 g rice, 2kg 20 g sugar and 10 kg 850g flour. Find the total weight of his purchases.

By heating 10 g CaCO_(3), 5.6 g CaO is formed. What is the weight of CO_(2) obtained in this reaction

A bullet of mass 20 g is horizontally fired with a velocity 150 m/s from a pistol of mass 2 kg . What is the recoil velocity of the pistol ?

A motor has an electrical input of 30 kJ and is used to raise 100 kg load to a height of 25 m when fitted to a crane winch. What is the efficienty of winch ? (g=10 ms^(-1))

A balloon weighing 50 kg is filled with 685.2 kg of helium at 1 atm pressure and 25^(@)C . What will be its pay load if it displaced 5108 kg of air ?

A helicopter of mass 1000kg rises with vertical acceleration of 15ms^(-2) . The crew and passengers together weigh 300kg . Give the magnitude and direction of (a) force on floor by the crew and passengers. (b) action on the rotor of the helicopter on the surrounding air. (c ) force on the helicopter due to the surrounding (g=10Nms^(-2))

Gravitational force on the surface of the moon is only (1)/(6) as strong as gravitational force on the earth. What is the weight in newtons of a 10 kg object on the moon on the earth?

A gun weighing 100 kg is used to fire an iron ball weigh ing 1 kg horizontally from a cliff of height 500 m above the ground. The ball falls 400 m away from the bottom of the cliff. What is the recoil velocity of the gun? (Take g =10 ms^(-2))