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Get college assignment help at uniessay writers A uniform bar of length 16 m and mass 6 kg is attached to a wall with a hinge that exerts a horizontal force Hx and a vertical force Hy on the bar. The bar is held by a cord that makes a 90◦ angle with respect to bar and 50 ◦ with respect to wall. What is the magnitude of the horizontal force Hx on the pivot? The acceleration of gravity is 9.8 m/s2 . Answer in units of N.

A bowling ball rolls without slipping up a ramp that slopes

A bowling ball rolls without slipping up a ramp that slopes upward at an angle B to the horizontal. Treat the ball as a uniform, solid sphere, ignoring the finger holes. What is the acceleration of the center of mass of the ball?

Determine the magnitude and direction of the electric field at a

Determine the magnitude and direction of the electric field at a point midway between a -8.0 uC and a 5.8 uC charge 8.0 cm away. Assume no other charges are nearby.

an olympic skier ,oving at 20.0m/s down a 30.0 defree slope

an olympic skier ,oving at 20.0m/s down a 30.0 defree slope encounters a region of wet snow and slides 145m before coming to a halt. What is the coefficient of friction between the skies and the snow?

Consider a protein sphere with a radius of 18 Angstroms and

Consider a protein sphere with a radius of 18 Angstroms and charge Q= -10e in an aqueous solution of c(infinity) = 0.05M Nacl at 25 degree centigrade.we assume that small ions as point charges and use linear approximation of poisson boltzmann equation. a) derive the expression for potential v(r) of the charged sphere. b)what is the surface potential of the protein in units KbT/e c)What is the concentration of sodium and chloride ions at surface of protein. d)what is the concentration of sodium and chloride ions at a distance 3 angstroms from protein surface.

a) Calculate what resolving power is needed to measure with a

a) Calculate what resolving power is needed to measure with a spectrograph the natural line width of the alpha particles from Po-212 (use the uncertainty principle). B) Estimate the contribution to the experimentally ovserved line width of Po-212 from the heat motion of the source. (Calculate the energy of the alphas when the nucleus is moving with energy 3/3kT in the direction of, and opposite the direction of the emitted alpha.) c) Comment on the effect of detector cooling in a detector revolving power

A 16 kg box slides d = 4.0 m down the

A 16 kg box slides d = 4.0 m down the frictionless ramp, then collides with a spring whose spring constant is 250 N/m. angle is 30 degrees. What is the maximum compression of the spring?

A person exerts a horizontal force of F = 160 N

A person exerts a horizontal force of F = 160 N in the test apparatus shown in the drawing. (h = 0.35 m.) Find the horizontal force M that his flexor muscle exerts on his forearm.

A 2.4 kg block of wood sits on a table. A

A 2.4 kg block of wood sits on a table. A 3.0 g bullet, fired horizontally at a speed of 50 m/s , goes completely through the block, emerging at a speed of 180 m/s .

Consider a pair of slits separated by micrometers. What is the

Consider a pair of slits separated by micrometers. What is the angle to the interference maximum with for red light with a wavelength of nanometers?

In the Atwood machine shown below, m1 = 2.00 kg and

Get college assignment help at uniessay writers In the Atwood machine shown below, m1 = 2.00 kg and m2 = 7.95 kg. The masses of the pulley and string are negligible by comparison. The pulley turns without friction and the string does not stretch. The lighter object is released with a sharp push that sets it into motion at vi = 2.35 m/s downward.

A roller coaster, shown in Fig. 6-38 (h1 = 40 m,

A roller coaster, shown in Fig. 6-38 (h1 = 40 m, h2 = 10 m, h3 = 24 m), is pulled up to point A where it and its screaming occupants are released from rest. Assuming no friction, calculate the speed at points B, C and D. point B

An object of mass is traveling on a horizontal surface. There

An object of mass is traveling on a horizontal surface. There is a coefficient of kinetic friction between the object and the surface. The object has speed when it reaches and encounters a spring. The object compresses the spring, stops, and then recoils and travels in the opposite direction. When the object reaches on its return trip, it stops.

Multiple-Concept Example 5 reviews many of the concepts that play a

Multiple-Concept Example 5 reviews many of the concepts that play a role in this problem. An extreme skier, starting from rest, coasts down a mountain that makes an angle of 36.6 ° with the horizontal. The coefficient of kinetic friction between her skis and the snow is 0.152. She coasts for a distance of 14.3 m before coming to the edge of a cliff. Without slowing down, she skis off the cliff and lands downhill at a point whose vertical distance is 3.50 m below the edge. How fast is she going just before she lands?

Please review and answer the questions on the attachment. There is

Please review and answer the questions on the attachment. There is two parts.

A speed ramp at an airport is basically a large conveyor

A speed ramp at an airport is basically a large conveyor belt on which you can stand and be moved along. The belt of one speed ramp moves at a constant speed such that a person who stands still on it leaves the ramp 67 s after getting on. Clifford is in a real hurry, however, and skips the speedramp. Starting from rest with an acceleration of 0.34 m/s2, he covers the same distance as the ramp does, but in one-fourth the time. What is the speed at which the belt of the ramp is moving?

An Alaskan rescue plane traveling 45 m/s drops a package of

An Alaskan rescue plane traveling 45 m/s drops a package of emergency rations from a height of 142 m to a stranded party of explorers. The acceleration of gravity is 9.8 m/s 2 . Where does the package strike the ground relative to the point directly below where it was released?

m 19m /s 45 ◦ 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀

m 19m /s 45 ◦ 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 􏰀 An Alaskan rescue plane traveling 45 m/s drops a package of emergency rations from a height of 142 m to a stranded party of explorers. The acceleration of gravity is 9.8 m/s 2 . Where does the package strike the ground relative to the point directly below where it was released?

A 1180-kg car is being driven up a 6.89 ° hill.

A 1180-kg car is being driven up a 6.89 ° hill. The frictional force is directed opposite to the motion of the car and has a magnitude of 484 N. A force F is applied to the car by the road and propels the car forward. In addition to these two forces, two other forces act on the car: its weight W and the normal force FN directed perpendicular to the road surface. The length of the road up the hill is 347 m. What should be the magnitude of F, so that the net work done by all the forces acting on the car is 182 kJ?

A 3.20 kg block is in equilibrium on an incline of

A 3.20 kg block is in equilibrium on an incline of 24.8◦. The acceleration of gravity is 9.81 m/s2 . What is Fn of the incline on the block? Answer in units of N.

a board is 4.2 m long and weighs 230 n. how

a board is 4.2 m long and weighs 230 n. how far x can a man who weighs 447 n from the right support which is 1.1 m from the right side of the board before the board tips?

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