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Étiquette : ICSE PHYSICS
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Calculating Force: Magnitude and Direction in Physics
Question: A constant force acting on a body of mass 3.0 kg changes its speed from 2.0 ms-1 to 3.5 ms-1 in 25 sec. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force? Solution: Calculating the Acceleration: Initial velocity of the body $${u=2 \ \frac{m}{s}}$$…
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Calculating Car Retardation and Stopping Time in Physics | Explanation
Question: A car moving along a straight highway with speed of 126 Kmh-1 is brought to a stop within a distance of 200 m. What is the retardation of the car (assumed uniform), and how long does it take for the car to stop? Solution: Initial velocity of the car u =126 Kmh-1 Converting the…
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Ball Thrown Upward: Motion Analysis and Calculations
Question: A player throws a ball upwards with an initial speed of 29.4 ms-1 . Solution: Upward direction: Position-Positive Velocity-negative Acceleration-positive Downward direction: Position-positive velocity – positive Acceleration-positive $${u=gt}$$ $${t=\frac {u}{g}}$$ $${t=\frac{29.4}{9.8}}$$ $${t= 3\sec}$$ Total time taken =Time taken to reach top +Time taken to reach the bottom $${3 \ s +3 \ s =6…
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Building Height Calculation Using Motion Equations
Question: A particle is projected up with an initial speed of u=10 ms-1 from the top of a building at time t=0.At time t=5 sec, the particle strikes the ground.Find the height of the building. Solution:Building height calculation Solution: Net displacement of the particle is the difference of final position(C) and the initial position(A). Applying…
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Stone’s Fall: Time and Speed Calculation
Question: A stone is dropped from the top of a building of height 20 m.Find the time taken for the stone to reach the ground.Also find the speed of the stone just before hitting the ground. Solution: Time taken to reach the ground Initial velocity of the stone (u) = 0 The displacement for the…