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ICSE Class IX Question Bank 2025 : Physics

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LODHA WORLD SCHOOL Near Khidkaleshwar Temple, Kalyan - Shilphata Road, Dombivali East, Palava, Maharashtra 421204, Ph. No. - 0251 6699588 LODHA WORLD SCHOOL 2023-24 Std-IX Sub-Physics Name: _______________________ Div:____ Roll No.: __ Date: ________ Q1. Choose the correct option i) The inertia of an object tends to cause the object (a) to increase its speed (b) to decrease its speed (c) to resist any change in its state of motion (d) to decelerate due to friction ii) Rocket works on the principle of conservation of (a) mass (b) energy (c) momentum (d) velocity iii) If the mass of a body is doubled and its velocity becomes half, then the linear momentum of the body will (a) remain same (b) become double (c) become half (d) become four times. iv) A ball is thrown vertically upward in a train moving with uniform velocity. The ball will (a) fall behind the thrower (b) fall ahead of the thrower (c) return back to the thrower (d) fall on the left of the thrower v) An athlete does not come to rest immediately after crossing the winning line due to the (a) inertia of motion (b) inertia of rest (c) inertia of direction (d) none of these Q2. Solve the following. i) Which would require a greater force- accelerating a 2 kg mass at 5 m/s2 or 4 kg mass at 2 m/s2? ii) A cricket ball of mass 70 g moving with a velocity 0.5 m/s is stopped by player in 0.5 s. What is the force applied by the player to stop the ball? iii) A ball of mass 0.01 kg is moving with a velocity 50 m/s. On applying a constant force for 2 seconds on the ball, it acquires a velocity of 70 m/s. Calculate a) Initial and final momentum of the ball b) The rate of change of momentum c) Acceleration of the ball Q3. Answer the following: i) Write SI unit of a) force and b) momentum ii) Why is it easier to catch a table tennis ball than a cricket ball, even both are moving with the same velocity? iii) Velocity versus time graph of a ball of mass 50 g rolling on a concrete floor is shown in the figure. Calculate the acceleration and frictional force of the floor on the ball.

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