Force and laws of motion
Newtons third law of motion, conservation of momentum
1. State Newton's third law of motion.
2. Why does a rubber ball rebounds when struck against a hard floor?
3. Why does a gun recoil when a shot is fired from it?
4. Why does a boat move forward into the water when the boatman presses one end of the pole against the ground?
5. What is the principle of conservation of momentum?
6. A bullet of mass 10 g is fired at a speed of 400 m s1 from a gun of a mass of 4 kg. What is the recoil velocity of the gun?
7. If action is always equal to the reaction, explain how a horse can pull a cart?
8. Why is it advised to tie the luggage kept on the roof of a bus with a rope?
9. There are three solids made up of aluminium, steel, and wood, of the same shape and same volume. Which of them would have highest inertia?
Newtons third law of motion, conservation of momentum
1. State Newton's third law of motion.
2. Why does a rubber ball rebounds when struck against a hard floor?
3. Why does a gun recoil when a shot is fired from it?
4. Why does a boat move forward into the water when the boatman presses one end of the pole against the ground?
5. What is the principle of conservation of momentum?
6. A bullet of mass 10 g is fired at a speed of 400 m s1 from a gun of a mass of 4 kg. What is the recoil velocity of the gun?
7. If action is always equal to the reaction, explain how a horse can pull a cart?
8. Why is it advised to tie the luggage kept on the roof of a bus with a rope?
9. There are three solids made up of aluminium, steel, and wood, of the same shape and same volume. Which of them would have highest inertia?
