Étiquette : GRADE 11 PHYSICS
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Vertical Ball Motion: Distance and Displacement in 3 Seconds
Question: A ball is thrown vertically upward with a velocity of 20 ms-1.Find Solution: Thrown up- Sign convention https://shopify.pxf.io/c/4884043/1295413/13624 (a) Distance travelled by the ball in first three seconds When a ball is thrown vertically upward, the velocity at its highest point is zero (v=0) Here initial velocity of the ball (u) =20 ms-1 Hence…
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Average Speed Calculation: 3/4th and 1/4th Distance
Question: A particle covers 3/4 th of total distance with speed v1 and next 1/4 th with speed v2. Find the average speed of the particle. Solution: $$Average \ speed = \frac{Total \ distance}{Total \ time \ taken}$$ Total distance is $${\frac{3}{4}(d)+\frac {1}{4}(d) =d}$$ Let the speed be v1 for the 3/4 th distance and…
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Ball Meeting Point Calculation: Free Fall and Vertical Projection
Question: A ball is dropped from height 100 m and another ball is projected vertically up with a velocity 50 ms-1 from the ground along the same line. Find out the position where the two balls will meet? Solution: First case, when the first ball is dropped Motion under gravity- Sign convention $${100-y=\frac{1}{2}gt^2}$$ $${y=100-\frac{1}{2}gt^2}$$ Let…
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Projectile Motion: Maximum Height and Range Calculation
Question: A ball is thrown at a speed of 50 ms-1 at an angle of 600 with the horizontal.Find the maximum height reached and the range of the ball (Take g= 10 ms-2 ) Solution: Finding the maximum height of the ball : Initial velocity of the ball u =50 ms-1 Angle made with the…
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Average Speed of a Car Traveling at Varying Speeds | Calculation & Concept
Question: A car covers the first half of the distance between two places at a speed 40 Kmh-1 and the second half 60 Kmh-1.What is the average speed of the car? Solution: $${Average \ speed = \frac{Total \ distance} {Total \ time \ taken}}$$ Let the distance between the two places be ‘2d’ Km Time…
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