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How far out from an axis must a 1200 N force be applied (i.e. what is the forces moment arm) in order to counter and hold a 90 Nm torque acting in the clockwise direction?
A merry-go-round is rotating at constant angular speed. Two children are riding the merry-go-round: Alan is riding at point A and Isamu is riding at point B. What child moves with the greater magnit
Express your answer in terms of the cylinder's radius r and the magnitude of the acceleration due to gravity g.
Consider an object with s = 12; rm cm that produces an image with s' = 15; rm cm. Note that whenever you are working with a physical object, the object distance will be positive (in multiple optics
(a) what is the rate at which energy is transferred by heat through the glass? (b) how much energy is lost through the window in one day assuming the temperatures inside and outside remain constant?
A 1.4 kg object at x = 2.00 m, y = 3.10 m moves at at an angle 45° north of east. Calculate the magnitude of the object's angular momentum about the origin.
The maximum applied force of compression that one man's thighbone can endure without breaking is 6.50 104 N. The minimum effective cross-sectional area of the bone is 4.30 10-4 m2, its length is 0.5
A ferry boat is 4.2 m wide and 8.7 m long. When a truck pulls onto it, the boat sinks 8.27 cm in the water. What is the weight of the truck? The acceleration of gravity is 9.81 m/s2 .
The distance between two telephone poles is 48.0 m. When a 0.600 kg bird lands on the telephone wire midway between the poles, the wire sags 0.200 m. Draw a free-body diagram of the bird. (Do this o
A 250 g block hangs from a spring with spring constant 9.0 N/m. At t=0;{rm s} the block is 17 cm below the equilibrium point and moving upward with a speed of 116 cm/s. What is the block's oscillat
A 1.0--tall vertical tube is filled with 20 water. A tuning fork vibrating at 574 is held just over the top of the tube as the water is slowly drained from the bottom.
Find the rms speed of H2, helium atoms, and N2 at room temperature. Compare this to the escape speed from the earth. (b). At what temperature would the rms speeds be equal to the escape speed from
A scaffold of mass 40 kg and length 6.0 m is supported in a horizontal position by a vertical cable at each end. A window washer of mass 61 kg stands at a point 2.1 m from one end. What is the tensi
At the same instant a truck traveling at a constant speed of 18 m/s overtakes and passes the automobile. a. sketch the position of each vehicle as a function.
Assuming isothermal conditions and treating the helium as an ideal gas, what fraction of the original gas remains in the container?
If the ladder has a mass of 20 kg and it makes an angle of 60 degree with the ground, find the force of friction of the ground on the foot of the ladder.
The counterbalance w1 weighs 120 N. Determine the weight w2 and the angle α needed so that no force is exerted on the hip joint by the leg plus cast.
A car drives straight off the edge of a cliff that is 58 m high. The police at the scene of the accident observed that the point of impact is 121 m from the base of the cliff. How fast was the car t
An 1800kg Indy racecar with a speed of 135 km/hr goes around a level, circular track with a radius of .775 km. (a) Calculate the centripetal acceleration of the car. (b) Calculate the friction force
The total charge on the semicircle is 12.0 micro coulomb. calculate the total force on a charge of 3.0E-6 coulomb placed at the center of the curvature.
Two cars are initially 279 km apart and traveling toward each other on a straight stretch of freeway. One car is moving at 38 m/s and the other is moving at 75 m/s. In how many seconds will they pa
Though slow on land, the leatherback turtle holds the record for the fastest water speed of any reptile: 9.78 m/s. It is also among the largest of reptiles. Suppose the largest leatherback yet disco
calculate the redshift of this galaxy, 2) convert this redshift to a velocity for the galaxy, and 3) determine the distance to this galaxy given its measured redshift.
The distance between their centers will be twice that. What will be the total kinetic energy of both particles an instant before they touch?