When applying the law of conservation of energy, to the bottom most point of the oscillation, there's only maximum elastic potential energy if we assume it to have 0 potential energy. At the center of oscillation, there's maximum kinetic energy and zero elastic potential energy. That's how my...
The hydrostatic pressure equation, P=hρg is derived from P=F/A where F=mg and A=cross sectional area of the water column. As weight only acts downwards and it's force is only exerted in downward direction. Then why does pressure acts in all directions? How is the P=hρg still valid?
When the car is at low tangential velocity, friction acts opposing to the component of weight but when it is at high tangential velocities it act in the same direction as the weight component. How does that not create an resultant force.
A car at rest under the equilibrium of weight, reaction and friction on an circular bend, suddenly starts accelerating and travel in a circular path. It accelerates until the velocity reaches the maximum possible velocity that can be achieved while remaining in the same radius. Please explain...
In many books, the direction of the magnetic field is mentioned as north to south. It says they have marked it because the north pole of the compass faces to south. But why can't we say the direction is the opposite of it as the south also attracts to north? When I browsed answers, most replies...
For applications of ultrasound, detecting fractures using ultrasound is listed in one of my textbooks. According to that, ultrasound cannot travel through air right after it travelled through solid parts of the plane. Therefore if there was a fracture, the sound was supposed to be reflected...