Catégorie : PHYSICS
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Determining Coefficient of Static Friction at 15 Degree Inclination
Question: A mass of 4 Kg rests on a horizontal plane.The plane is gradually inclined until an angle 15o with the horizontal, the mass just begins to slide.What is the coefficient of static friction between the block and the surface. Solution: Mass of the block 4 Kg Angle of inclination $${\theta=15^\circ}$$ At a particular angle…
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Determining Maximum Horizontal Distance of a Projectile
Question: The ceiling of a long hall is 25 m high.What is the maximum horizontal distance that a ball thrown with a speed of 40 ms-1 can go without hitting the ceiling of the hall? Solution: Calculating the maximum horizontal distance Projectile motion image: Maximum height of the projectile: Maximum height of a projectile is…
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Finding Coefficient of Friction for Mass Sliding Down 60 degree Inclined Plane
Question: A block of mass m slides down the plane inclined at an angle 60o with an acceleration g/2 .Find the coefficient of kinetic friction. Solution: Finding the coefficient of friction As the block of mass m is moving on the inclined plane , the kinetic friction fk comes into play. The forces acting on…
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Train Retardation Calculation | Physics Problem Solution
Question: A train was moving at the rate of 54 Kmh-1 when brakes were applied. It came to rest within a distance of 225 m. Calculate the retardation produced in the train. Solution: Calculating the retardation Initial velocity(u): (Conversion from Kmh-1 to ms-1) $${54 \ \frac {km}{h}=54 \ (\frac{5}{18}) \ \frac{m}{s}}$$ $${u=15 \ \frac{m}{s}}$$ Final…
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Cricket Ball Speed and Angle: Will It Go for a Six?
Question: In the cricket game,a batsman strikes the ball such that it moves with a speed 30 ms-1 at an angle 30o with the horizontal. The boundary line of the cricket ground is located at a distance of 75 m from the batsman.Will the ball go for a six?(Neglect air resistance, take g=9.8 ms-2) Solution:…
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