Mechanics | Relativity Answers

A liquid of density 1.17 × 103 kg/m3 flows steadily through a pipe of varying diameter and height. At location 1 along the pipe the flow speed is 9.47 m/s and the pipe diameter is 1.11 × 101 cm. At location 2 the pipe diameter is 1.77 × 101 cm. At location 1 the pipe is 9.45 m higher than it is at location 2. Ignoring viscosity, calculate the difference between the fluid pressure at location 2 and the fluid pressure at location 1.

A building superintendent twirls a set of keys in a circle at the end of a cord. If the keys have a centripetal acceleration of 110 m/s2 and the cord has a length of 0.25 m, what is the tangential speed of the keys?

An object is moving with constant velocity ~v.
Which situation is impossible in such a circumstance?

A man of weight 600N runs up a flight of stairs of vertical height 7m in 10s. The output power of the man is ?

An object is launched at 40 m/s at 40 degrees from the horizontal. It lands on a platform 10 meter below the height it started from. What is delta x? (distance traveled horizontally)

During a baseball game, a batter hits a high pop-up. If the ball remains in the air for 5.5 s, how high does it rise? Hint: Calculate the height using the second half of the trajectory.
______m

a force acts on a body for 0.5s changing its momentum from 16kgms-1 to 21kgms-1.calculate the magnitude of the force

The minimum force require to seprate a light glass plate of perimeter 5m from a water surface is ( surface tension of water 70 into 10 raise to poer minus 3 N /m)

The pressure inside an air bubble of radius 2 cm formed 20 cm below an water surface is (surface tension of water = 70 into 10 raise to power minus 3 N/m)

TO what height does a liquid of density 0.4 into 10 raise to power 3 kg m/ cube and surface tension 0.05 N/m rise in a capillary tube of radius 0.2 mm when dipped in (given cos@=0.4 , g=10 m /s square)