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POWER

POWER

POWER a skier of mass 70kg is pulled up a slope by a motor driven cable. How much work is required to pull him 60m up a 30 degrees slope, assuming its frictionless, at a constant speed of 2.0m/s?

Physics problem: blocks on an inclined plane

Physics problem: blocks on an inclined plane

Physics problem: blocks on an inclined plane Prove that if a block slides down an inclined plane of height H, which is on top of a table of height H, that if it is launched horizontally the horizontal distance it travels before hitting the ground is 2H. Galileo knew this and tried to demonstrate it […]

On curing of cement..

On curing of cement..

On curing of cement.. We did casting of our RCC roof. Watering was done about 15 hrs from the time the concrete was laid and for the portions cast in the initial hours, it was almost 22 hours when it got watering.. Is this ok ? For how many weeks, the RCC slab need to […]

2a

2a

2a An observer that is listening to a stereo through a speaker decides to walk away from the speaker to a position that is ten times further than his original position. What will be the change in the sound level in decibels and will this change be an increase or decrease?