Mechanics | Relativity Answers

Does the power needed to raise a box onto a platform depend on how fast it is raised?

Suppose that the Earth orbits the Sun in a perfect circle. Does the Sun do any work on the Earth?

Give a situation in which positive work is done by a static frictional force?

A crate, heavier than you are, rests on a rough floor. The coefficient of static friction between the crate and the floor is the same as that between the soles of your shoes and the floor. Can you push the crate across the floor?

"You have two containers, one filled with water the other empty. You connect a tube to the bottoms of the containers. What happens to the water?

any real spring has mass. if this mass has taken into account explain qualitatively how this will affect the period of oscillation of spring mass system?

The velocity of a body moving along x-axis is given by v =(36+2x)^1/2 where v is in m/s and x is in metre.Find distance travelled by it in 2nd second.

Calculate value of x for which vectors 3i-2j+3k and xi+3j-3k are perpendicular

16 bulbs of 40 Watt are used for 6 hours a day along with one 100 watt bulb for two hours. Calculate the units of energy consumed in one day by all the bulbs.

how long does it take for the hoop to roll down without sliding from the inclined plane of length 2 m and height 10 cm ?