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A turbine blade rotates with angular velocity w(t)= 2.00 rad/s - 2.100 rad/s^3 t^2.
What is the angular acceleration of the blade at t = 9.1 s?
find the angular displacement of the propeller.
A father racing his son has three-fifths the kinetic energy of the son, who has one-third the mass of the father. What is the original speed of the father
A 15.9g bullet traveling horizontally at 871m/spasses through a tank containing 14.5kg of water and emerges with a speed of 537m/s
A person walks 25.0° north of east for 2.70 km. How far would the person walk due north and due east to arrive at the similar location.
The small piston of a hydraulic lift has a raduis of 1 in and the large piston has a radius of 5 in. What is the weight of the heaviest vechicle that can be lifted
A hunter on a frozen, essentially frictionless pond uses a rifle that shoots 4.20g bullets at 960m/s. Find the recoil velocity of the hunter if he fires the rifle horizontally
A railroad car of mass 2.52 x10^4 kg, is moving with a speed of 3.94 m/s. It collides and couples with three other coupled railroad cars, each of the equal mass as the single car and moving in the equal direction with an initial speed of 1.97 m/s.
A consumer upset with the latest trend of postal rate increases has decided to try to send letters by balloon even though they may not reach their intended destination
The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on earth? Give the answer by determining the ratio Fsun/ Fmoon of magnitudes of gravitational forces.
What is the net upward force on an airplane wing of area 20.7 m2 if the speed of air flow is 232 m/s across the top of the wing and 215 m/s across the bottom? (The density of air where the airplane flies is ρair = 1.21 kg/m3.)
Two current-carrying wires are exactly parallel to one another and both carry 3.5 A of current. What is the direction of the magnetic force caused by wire 2 on wire 1
A plastic bag is filled with nitrogen at atmospheric pressure and 27.0 oC. If hot air is used instead of nitrogen, what is the required volume of the balloon if the air inside can be maintained at 39.0 oC
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