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Read the paragraph and answer the questions:Paragraph(a) When a bat strikes a ball, the ball exerts an equal and opposite force on the bat. The force : acting on the ball projects it with high velocity, Due to the large mass of bat compared to ball, reaction force on the bat slows down the bat’s motion. (b) When a bullet is fired from a gun, the gun exerts a force on the bullet in the forward direction. This is the action force. The bullet also exerts an equal force on the gun in the backward direction. This is the reaction force. Due to the large mass of the gun, it j moves only a little distance backward. This backward movement of the gun is called the recoil of the gun. (c) In a rocket, burning fuel creates a push on the front of the rocket pushing it forward. This creates an equal and opposite push on the exhaust gas backwards.(i) Which of Newton’s law examples are given here?(ii) When a rifle is fired it is pushed back this movement is called what?(iii) What does the ball acquire after it gets velocity?(iv) State newton’s 1st law of motion(v) Which force is required to produce motion in an object? |
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Answer» (i) Newton’s 3rd law is stated by the above example (ii) Movement of rifle getting pushed back after firing is called recoil. (iii) The ball acquires momentum after it gets velocity. (iv) An object continues to remain at rest or in a state of uniform motion along a straight line unless an external unbalanced force acts on it. (v) Unbalanced force is required to produce motion in an object. |
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