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A helicopter lowers a rope with a seat at the end to resue someone. The seat has a mass of 4.4 kg. The person has a mass of 74.4 kg. The rope can be considered massless. The rope can only safely sustain a force of 860 N. The pilot intends to lift the person straight up into the air with an acceleration of 1.2 m/s^2. How much tension will be on the rope? Will it be safe for the person to get on?
(a) compute the absolute pressure at the bottom of a freshwater lake at a point whose depth is 25.5 m. assume the density of the water is 1.00 x10^3 kg/m3 and the air above is at the pressure of 101.3 kPa.
The nucleus of an atom has a radius of about 5.1×10-15 m. The electron is normally at a distance of about 6.2×10-11 m from the nucleus, Find the volume of the nucleus
An object is placed 30 cm from a converging lens forms an image 40 cm from the lens. is the image which is formed real or virtual
a man sitting in a bosun's chair that dangles from a massless rope, which runs over a massless frictionless pulley, In each of the four cases, what is the force exerted on the ceiling by the pulley system
A box of mass 50 kg is at rest on a horizontal frictionless surface. A constant horizontal force F then acts on the box and accelerates it to the right. What is the magnitude of the force
here is a point on the x-axis between the two charges where the electric field is zero. Find out the location of the point where the electric field is zero.
An ideal spring of negligible mass is 11 long when nothing is attached to it. When you hang a 3.20- weight from it, you measure its length to be 12.3.
A 28.0 {rm kg} child plays on a swing having support ropes that are 2.20 {rm m} long. A friend pulls her back until the ropes are 45.0^circ from the vertical and releases her from rest.
Io, a satellite of Jupiter, has an orbital period of 1.77 days and an orbital radius of 4.22 x 10^5 km. From these data, determine the mass of Jupiter
4 moles of an ideal gas have an initial temperature of 127 C. The temperature of the gas is kept constant and the volume is increases until the pressure drops to 40.0% of its original value. Calculate the heat added to the gas
A uniform disc of mass m and radius R is rigidly mounted coaxially with a lightweight disc of radius r = R/2, to a horizontal shaft, on which combination is free to rotate frictionless. Light strings are wound in opposite directions about the cyli..
A vehicle attempting to aerbrake into orbit around Mars needs to achieve an equivalent deltaV(retro) of 2 km/s. what is the average drag force (in g's) we must attain
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