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Riders on the "Great American Revolution" loop-the-loop roller coaster wear seatbelts as the roller coaster negotiates its 6.5m -radius loop with a speed of 9.8m/s. 1) At the top of the loop, what is the magnitude of the force exerted on a 55kg rider by the roller-coaster seat? 2) At the top of the loop, what is the magnitude of the force exerted on a 55kg rider by the seatbelt?
find the time rocket reaches the peak height of trajectory.
An object weighs 277 N in the air. When tied to a string, connected to a balance, and immersed in water, it weighs 221 N. When it is immersed in oil, it weighs 257 N.
Consider a very high energy cosmic ray photon, with energy 109mp = 1018 eV as measured in Sun's rest frame, scattering off a cosmic microwave background photon with energy 2 x 10-4 eV . Establish the maximum energy of the scattered photon.
A satellite is in a low circular orbit about the Earth (such as it just skims the surface of the Earth). How long does it take to make one revolution around Earth.
If John Glenn weighed 640 N on the Earth's surface, i) how much would be having weighed if his Mercury spacecraft had (hypothetically) remained at twice the distance from the center of the earth? ii) Why is it said that an astronaut is never truly..
Compute approximately the time the ball is in contact with the floor to be 0.04 seconds. Compute the average force the floor exerts on the ball.
What is the net force exerted on the skier, assume his acceleration is constant.
A spaceship moves past you at speed v. You measure the ship to be 287 m long, whereas an astronaut on the ship measures a length of 380 m. Find out v.
In the Millikan oil-drop experiment, an atomizer (a sprayer with a fine nozzle) is used to introduce many tiny droplets of oil between two oppositely charged parallel metal plates.
Calculate the y-component of the magnetic force. How fast must the candy bar travel to have the same joules in the form of kinetic energy.
A ball is tossed from an upper story window of a building. Compute the height from which the ball is thrown.
A flight attendant pulls her 69N flight bag a distance of 246m along a level airport floor at a constant velocity. The force she exerts is 37N at an angle of 58° above the horizontal. Find the coefficient of kinetic friction between flight bag and..
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