Étiquette : GRADE 11 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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Calculation of average retarding force : to save a child on road
Question: The driver of a three-wheeler moving with a speed of 36 Kmh-1 sees a child standing in the middle of the road and brings his vehicle to rest in 4.0 s just in time to save the child.What is the average retarding force on the vehicle? The mass of the three-wheeler is 400 Kg…
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Determining the Angle Formed at the Middle of the String in a Pulley-block system
Question: Determine tha angle formed at the middle of the string where a block of mass $${\sqrt2 \ m}$$ is hanging as shown below where the pulleys are smooth and the string used is inextensible. Solution: Free body diagram of the blocks of different masses: Equilibrium at the mid-point: Equilibrium refers to the situation when…
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Acceleration in Pulley-Block System: Solving for Acceleration with Two Blocks of Different Masses
Question: A pulley with two blocks of different masses are shown below.Find the acceleration in the pulley-block system. Solution: Acceleration in the pulley-block system: Free body Diagram: For 1 Kg block: Force of gravity = m1 g = 1 g Tension in the string = T For 3 Kg block : Force of gravity =…
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Block and Trolley System: Acceleration and String Tension Calculation
Question: What is the acceleration of block and trolley system shown below, if the coefficient of kinetic friction between the trolley and the surface is 0.04? What is the tension in the string? (take g=10 ms-2).Neglect the mass of the string. Solution: Acceleration and tension calculation The force on the block causes tension in the…
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