Mechanics | Relativity Answers

for a cantilever beam with a point load and a moment , and yield strength of the material specified with young's modulus how do we calculate the point load as well as moment,applied moment is proportional to load as follows (M=10 P).

A 9.9 g bullet is accelerated in a rifle barrel 101 cm long to a speeen of 933 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated. Answer in units of N

I am trying to figure out how to solve the following: Calculate the speed of an 8.0 x 10(to the 4th)kg airliner with a kinetic energy of 1.1 x 10(to the 9th) J.

Superman (m = 90 kg) jumps over a 50 m tall building by first accelerating from rest to his maximum velocity in 0.001 s. Subsequent to this time, Superman follows normal projectile motion. What is the average force acting on Superman that gives his upward acceleration?.

Imagine that you are solving a problem in projectile motion in which you are asked to find the time at which a projectile reaches a certain vertical position. When you solve the problem,you will find two different position values for time that both satisfy the condition of the problem. Explain how this result is not only possible,but also logical, remember to cite your sources.

a man stands on the roof of a building that is 30m tall and throws a rock with a velocity of magnitude of 40m/s at an angle of 33 degress a bove the horizontal. Calculate the following:
a.) The maximum height above the roof reached by the rock.
b.) The magnitude of the velocity of the rock just before it strikes the ground.
c.) The horizontal distance from the base of the building to the point where the rock strikes the ground.

A bullet traveling horizontally at a speed of 370m/s hits a board perpendicular to its surface, passes through and emerges on the other side at a speed of 220m/s. If the board is 3.90 thick, how long does the bullet take to pass through it?

a stone is dropped into the water from a bridge 44 meters high& and another one is thrown vertically downward one second after the first stone is dropped. both stones strike the water at the same time. what is the second stone initial velocity?

The movie "the Gods Must Be crazy " begins with a pilot dropping a bottle out of an airplane. It is recovered by a surprised native below, who thinks it is a message from the gods. If the plane from which the bottle was dropped was flying at an altitude of 500.m, and the bottle lands 400.m horizontally from the inital dropping point, how fast was the plane fling when the bottle was released.? Need to know how to get the answer

A bouy lies 1000metres east and 2000m north of a start line. a boat starts at start line and travels on a bearing of 045deg at 6ms-1. After 6 mins the boat turnd and increases speed tp 9ms-1. How long does it tak boat to reach buoy?