Recent content by SDewan

Is this attraction due to adhesive - cohesive forces?

When there is Capillary rise in tube of insufficient length, why does not the liquid overflow?

Please elucidate

On a single long string, two sinusoidal pulses are started from either end. They have a destructive interference. Both the pulses have kinetic as well as potential energy. Now the point at which they meet, there being a destructive interference, no crest or trough is formed. But right after...

Given a Simple Harmonic Progressive Wave with the equation y=A*sin(ωt-kx+φ) where A is amplitude, k is wave number, ω is frequency of wave and φ is the initial phase. How to determine in what direction is the wave propagating?

Hi all, Can anyone please help me out with the direction of friction in a case where there is a smooth spherical body pure rolling on a rough surface? What is the direction of friction? Also, is it possible to have pure rolling without friction? Thanks SD

Yes you can definitely break the motion into two parts. Part 1) When the ball is going up. Use the first equation of motion to find time to reach max height. Use third equation of motion for finding the max height. Part 2) When ball is falling down. Use the same procedure Add the times acquired...

Okay, so in your equation vf=vi+a*t, take care of the signs of velocity and acceleration. If you take downward direction to be positive, a will be negative, vi will be positive. Now calculate vf. My bad, relative not required.

The block was floating "on the water" initially. So the buoyant force exerted by the water at this position was equal to the weight of the block. Equilibrium was established. So at no position other than the initial position will the block be in equilibrium. Hence it will rise back up to its...

Since the lift is also under action of gravity, you need to take relative acceleration.

This case, though meets thecriteria, but is an extreme case.

Going by the definition, KE=1/2*m*v^2 Just consider a fully loaded truck moving slowly in a traffic jam. This meets the requirement for a heavy body and low KE. The only thing which is in our control is the velocity. So have as low a velocity as possible.

What exactly do you need it for? Then I may be able to help you better.

My bad. There will not be any difference in pressures. Understood. What I probably meant was the drag of the air outside the car.

Absolutely, but for "both" to acquire a constant speed, there must have been some initial force required, which was obviously friction. That is what I was mentioning.