Apparent weight in an elevator
You are standing on a bathroom scale in an elevator the is moving upward at constant speed, when suddenly the cable breaks. from just before to just after the cable breaks, the reading on the scale...
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Bouncing ball and energy dissipation problem
Please help me with the question below.. I’m totally confused! A player throws a ball of mass 0.6 kg into the air, to a height of 4.0 m above the ground. The ball then falls to the ground. During the...
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Why are you hurt more when you punch a wall then when you punch a sponge?
Why are you hurt more when you punch a wall then when you punch a sponge? Asked Shivangi Answer: This is explained on the basis of impulse momentum principle. Impulse of a force is the product of...
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Understanding Projectile Motion
IN A PROJECTILE MOTION WE TAKE MOTION IN A HORIZONTAL DIRECTION AS g=0 while in vertical motion as g=-9.8 meter / second square why? Asks Atanu PAUL Projectile Motion is an example for motion in two...
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Equilibrium – Numerical Problem
SOLID HEMISPHERE OF RADII R EACH, are placed in contact with each other with each other with their flat faces on a rough horizontal surface. A sphere of mass m and radius R is placed symmetrically on...
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Force – Impulse – Momentum
Hi All! I’m having mega problems with one part of a physics assignment. Looking for any help. The details are as follows: The diagram shows the normal force on Christine’s feet vs. time, as recorded by...
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View ArticleScore More in Physics without fear – A Physics teacher’s advice
When I interacted with students of class 11 and 12, I came to know that Physics is one of the subjects they FEAR most during exam time. Though it seems difficult to score high marks, it is not actually...
View ArticleYDSE (Young’s Double Slit Experiment)
In the question we have a simple YDSE setup , there’s just the addition of a glass slab of thickness t and ,refractive index u, in front of the top slit ( S1). Now we submerge the entire setup into...
View ArticleNewton second law and pendulum
A pendulum is hanged in the car. Car starts to move by constant acceleration How to measure acceleration by angle the pendulum? Asked Afshin Answer If the pendulum makes an angle θ with the vertical,...
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