Mechanics | Relativity Answers

What is Artificial Gravity, and how is it related to centripetal motion. Explain how artificial gravity could be created in a weightless environment and give reasons why we would want to do this

12 A force of 2i+7j N acts on a body of mass 5kg for 10 seconds. The body was initially moving with constant velocity of i−2j m/s. Find the final velocity of the body in m/s, in vector form

a hoisting engine lifts a 200 kg bucket containing 1200 Lof clay of density 2*10^3 kg m^3 to a height of 7 m in 20 sec. the power supplied to the engine is 12kW. calculate: work output in kJ, power output in kW and efficiency of the engine.

What potential difference is needed to accelerate an electron from rest to a speed of 1.6×106 ?

As it passes over Grand Bahama Island, the
eye of a hurricane is moving in a direction 40
north of west with a speed of 79 km/h. Three
hours later, it shifts due north, and its speed
slows to 15 km/h.
How far from Grand Bahama is the eye 4.50
h after it passes over the island?
Answer in units of km

how much work is done by a person if he pulls a crate with a force of 250 N at an angle of 60 and crate moves 20 m
if the same amount of force is applied horizontally, how much work is done if the crate still move the same distance ?

a metal wire 1.3mm in diameter 2.1m long hangs vertical with 6.1kg object hanging from it. wire stretches 1.4mm. what is value of Young's modulus for the metal?

Boo radley wants to run a 1500m race with an average velocity of 6.00m/s. after running the first 500m, Boo notices that the elapsed time is 1 min 40 seconds. panicking he accelerates for "t" seconds at 0.20m/s^2 and then finishes the race at his new faster speed. he makes it just in time. how ling did he acclerate for?

the position of a train along it tracks as a function of time is plotted as a graph. at t1=6.0secs x1=48.5m at t2=8.50secs x2=73.5m. find the average velocity of this body in k/h.

albert pujols is pitched a 0.145kg baseball at -39.m/s and he hits the ball on a horizontal line drives straight back toward the pitcher at 50.5m/s. if the contact time between bat and ball is 0.0033s. a) what is the acceleration on the ball? b) what is the magnitude of the net force acting on the ball during contact? c) fraw the free-body diagram of the forces acting on the ball during contact. d)once the ball leaves the bat, what is the acceleration acting on the ball? e)albert connected with the ball 1.0m off the ground.calculate , by showing your work and boxing your answer A) how many meters albert hit the ball in the air: B) how long the ball was in the air before it hit the ground?