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Get college assignment help at uniessay writers A 3.0-m-long rigid beam with a mass 120 {rm kg} is supported at each end. An 70 {rm kg} student stands 2.0 {rm m} from support 1. How much upward force does support 1 exert on the beam?

the 0.2 puck on the frictionless horizontal table is connected by

the 0.2 puck on the frictionless horizontal table is connected by a string through a hole in the table to a hanging 1.20 kg block. With what speed must the puck rotate in a circle of radius 0.5 m if the block is to remain hanging at rest?

what average power must the winch supply in order to accelerate

what average power must the winch supply in order to accelerate a 184kg ultralight glider from rest to 26m/s over a horozontil distance of 48m

170 students in a lecture hall can scream at 116 dB.

170 students in a lecture hall can scream at 116 dB. Thus, we should expect that 340 average students can do 232 dB. 1700 average students can do 126 dB. 85 average students can do 106 dB. the loudest student in the class can do 116 dB. an average student can do 0.68 dB by him or herself. 340 average students can do 126 dB.

An 18 g rifle bullet traveling 210 m/s buries itself in

An 18 g rifle bullet traveling 210 m/s buries itself in a 3.6 kg pendulum hanging on a 2.7 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of the pendulum’s displacement.

A 17 g rifle bullet traveling 235 m/s buries itself in

A 17 g rifle bullet traveling 235 m/s buries itself in a 3.7 kg pendulum hanging on a 3.0 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of the pendulum’s displacement.

Compute the escape velocity on Jupiter, which has a radius of

Compute the escape velocity on Jupiter, which has a radius of 7.14 107 m and mass 318 times the earth’s mass.

At a certain location, the horizontal component of the earth’s magnetic

At a certain location, the horizontal component of the earth’s magnetic field is 2.2 10-5 T, due north. A proton moves eastward with just the right speed, so the magnetic force on it balances its weight. Find the speed of the proton. m/s

A convex mirror has a focal length of -11 cm. A

A convex mirror has a focal length of -11 cm. A lightbulb with a diameter of 6.0 cm is placed 60.0 cm in front of the mirror. Locate the image of the lightbulb.

Determine the ray-transfer matrix for an optical system made of a

Determine the ray-transfer matrix for an optical system made of a thin convex lens of focal length f and a thin concave lens of focal length -f separated by a distance f. Discuss the imaging properties of this composite lens

A chair of mass 11.0 kg is sitting on the horizontal

Get college assignment help at uniessay writers A chair of mass 11.0 kg is sitting on the horizontal floor; the floor is not frictionless. You push on the chair with a force F = 41.0 N that is directed at an angle of 41.0^circ below the horizontal and the chair slides along the floor.

A 42 kg pole vaulter running at 13 m/s vaults over

A 42 kg pole vaulter running at 13 m/s vaults over the bar. Her speed when she is above the bar is 1.3 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar

It has been suggested that rotating cylinders about 12 mi long

It has been suggested that rotating cylinders about 12 mi long and 3.9 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration on Earth

A car of mass M= 900kg traveling at 45.0 kmh enters

A car of mass M= 900kg traveling at 45.0 kmh enters a banked turn covered with ice. The road is banked at an angle , and there is no friction between the road and the car’s tires. What is the radius of the turn if theta = 20.0 degrees (assuming the car continues in uniform circular motion around the turn)?

A constant torque of 21.4 N·m is applied to a grindstone

A constant torque of 21.4 N·m is applied to a grindstone whose moment of inertia is 0.125 kg·m2. Using energy principles, calculate the angular speed (in revolutions per second) after the grindstone has made 19.0 revolutions. (Neglect friction.) Do not enter units.

A worker pushed a 27 kg block 11.6 m along a

A worker pushed a 27 kg block 11.6 m along a level floor at constant speed with a force directed 34° below the horizontal. (a) If the coefficient of kinetic friction is 0.20, how much work was done by the worker’s force?

a solid, uniform disk of radius 0.250m andn mas 55.0kg rolls

a solid, uniform disk of radius 0.250m andn mas 55.0kg rolls down a ramp of length 4.50m that makes an angle of 25.0 degrees with the horizontal. the disk starts from rest from the top of the ramp. Find a. the speedd of the disk’s center of mass when it reaches the bottom of the ramp and b. the angular speed of the disk at the bottom of the ramp

children in a tree house lift a small dog in a

children in a tree house lift a small dog in a basket 4.50 m up to their house. if it takes 221 J of work to do this, what is the combined mass of the dog and the basket?

The coefficient of static friction between the m = 2.50 kg

The coefficient of static friction between the m = 2.50 kg crate and the 35.0° incline of the figure below is 0.320. What minimum force must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

A 10.9 g bullet is fired horizontally into a 69 g

A 10.9 g bullet is fired horizontally into a 69 g wooden block that is initially at rest on a frictionless horizontal surface and connected to a massless spring of constant 181 N/m. The bullet becomes embedded in the block. The acceleration of gravity is 9.8 m/s2 . If the bullet-block system compresses the spring by a maximum of 89.2 cm, what was the speed of the bullet at impact with the block?

A rotating cylinder about 16 {rm km} long and 8.4 km

A rotating cylinder about 16 {rm km} long and 8.4 km in diameter is designed to be used as a space colony.With what angular speed must it rotate so that the residents on it will experience the same acceleration due to gravity as on Earth?

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