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Get college assignment help at uniessay writers The gravitational force between 2 bodies is 18.4N when they are 80m apart. What is teh gravitational force between the bodies when they are twice as far apart?

Mr. Gewanter, whose mass is 60.0 kg, is doing a physics demonstration in the front of the classroom. a) How much gravitational force does he exert on 55.0-kg Martha in the front row, 1.50 m away? b) How does this compare to what he exerts on 65.0-kg Lester, 4.00 m away in the back row?

As part of a safety investigation, two 1200 kg cars traveling at 24 m/s are crashed into different barriers. Find the average forces exerted on (a) the car that hits a line of water barrels and takes 1.5 seconds to stop, and (b) the car that hits a concrete barrier and takes 0.3 seconds to stop.

a 5.00 Lb box sliding with a speed of 14.0 ft/sec along a horizontal surface encounters a rough area of the surface and comes to a stop at 1.35 sec later. what is the deceleration of the box? what is the coefficiant of kenetic friction in the rough area of the surface? what distance does the box cover before coming to a stop?

The press box at a baseball park is 36.0 above the ground. A reporter in the press box looks at an angle of 16.0 below the horizontal to see second base

2. Your neighbor’s pesky kid insists on shooting 25.0g rocks at your new 2.25 kg light fixture Your neighbor’s pesky kid insists on shooting 25.0g rocks at your new 2.25 kg light fixture hanging by a 26.0 cm wire from the ceiling of your porch. If each rock strikes the fixture traveling at 10.0 m/s horizontally and rebounds at 2.00 m/s backwards, how high above the lowest point does the impact make your light fixture swing? Please help!!!

Compressed air with mass 9.1 is stored in a gas cylinder with a volume of 4.5×10−2 . What is the density of the compressed air? How large a volume would the same gas occupy at typical atmospheric density of 1.2 ?

Many people mistakenly believe that the astronauts orbiting the earth are “above gravity.” Calculate the acceleration due to gravity, g, for space shuttle territory, 275 kilometers above the earth’s surface (dashed line in sketch). Earth’s mass is 6 1024 kg, and its radius is 6.38 106 m (6380 km).

A student (m = 60 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.04 s. The average force exerted on him by the ground is 18000 N, where the upward direction is taken to be the positive direction. From what height did the student fall? Assume that the only force acting on him during the collision is that due to the ground.

A 140 N child is in a swing that is attached to ropes 1.80 m long. Find the gravitational potential energy of the child-Earth system relative to the child’s lowest position at the following times.

Get college assignment help at uniessay writers A uniform door weighs 50.0 N and is 1.0 m wide and 2.7 m high. What is the magnitude of the torque due to the door’s own weight about a horizontal axis perpendicular to the door and passing through a corner?

What is the kinetic energy of an automobile with a mass of 1280 kg traveling at a speed of 11.4 m/s?

A wooden bucket filled with water has a mass of 75 kg and is attached to a rope that is wound around a cylinder with a radius of 0.075 m. A crank with a turning radius of 0.25 m is attached to the end of the cylinder. What minimum force directed perpendicularly to the crank handle is required to raise the bucket?

A converging lens (f = 11.0 cm) is held 5.60 cm in front of a newspaper, the print size of which has a height of 1.70 mm. Find (a) the image distance (in cm) and (b) the height (in mm) of the magnified print.

Sam, whose mass is 80.0 kg, takes off down a 55.0 m high, 10.0^circ slope on his jet-powered skis. The skis have a thrust of 220 N. Sam’s speed at the bottom is 40.0 {rm m/s}. What is the coefficient of friction of the snow?

A 20 loudspeaker is suspended 2.0 below the ceiling by two cables that are each 20 from vertical. what is tension of ropes

A massive steel cable drags a 25.0 kg block across a horizontal, frictionless surface. A 90.0 N force applied to the cable causes the block to reach a speed of 4.50 m/s in 1.50 s. What is the difference in tension between the two ends of the cable?

If the figure below, three uniform thin rods, each of length L = 30 cm, form an inverted U. The vertical rods each have mass of 14 g; the horizontal rod has mass of 52 g. Where is the center of mass of the assembly (x, y)?

Bonnie and Clyde are sliding 450 bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 440 of force while Bonnie pulls forward on a rope with 200 of force. what is the coefficient of kinetic friction of the bank on the floor?

A stone has a mass of 12.5kg on earth. what is its mass on the moon?

A simple pendulum in a science museum entry hall is 3.50 long, has a 1.25 bob at its lower end, and swings with an amplitude of 10.5.

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November 3, 2019