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Question: A 4.5 kg box slides down a 4.3-m-high frictionless hill, starting from rest, across a 2.0-m-wide horizontal surface, then hits a horizontal spring with spring constant 510 N/m. The other end of the spring is anchored against a wall. The ground under the spring is frictionless, but the 2.0-m-long horizontal surface is rough. The coefficient of kinetic friction of the box on this surface is 0.22. What is the speed of the box just before reaching the rough surface? What is the speed of the box just before hitting the spring? How far is the spring compressed? Including the first crossing, how many complete trips will the box make across the rough surface before coming to rest?
show that the rotation matrix between two coordinate systems can be calculated from knowledge of the position vectors
A wooden block with equal sides of 4 cm is floating in water. If the density of the block is half the density of water, how far is it from the water to the top of the block?
Compute the escape velocity for a planet whose mass is 3.00 x 1024 kilogram and whose radius is 600 kilometer
A landing airplane makes contact with the runway with a speed of 78.0 m/s and moves toward the south. After 18.5 seconds, the airplane comes to rest. What is the average acceleration of the airplane during the landing?
question a 100g iron ball specific heat0.473 jgc is heated to 125c and is placed in a calorimeter holding 200g of water
Assume the electri: field E in some region is uniform: it is the same at all points. Specifically, E has a m agnitude of 5 V/m and points in the +x direction.
A race car starts from rest on a circular track of radius 375 m. The car's speed increases at the constant rate of 0.727 m/s^2 , Find the elapsed time at the same moment
In a proton accelerator, the energy of proton is 20MeV, the diameter of the beam is 2.0mm, Find the current density and the particle density in the beam
The magnetic field in a Stern-Gerlach experiment varies along the vertical direction as dBz/dz = 20 T/cm. The horizontal length of the magnet is 7.1 cm and the speed of the silver atoms averages 925 m/s. The mass of the silver atoms is 1.8 x 10^-2..
If y=0 m for gravitational potential energy is the bottom of the incline, what is the total mechanical energy of the mass in Joules?
a balloonist records her altitude as 1208 meters. at the same time she measures the angle of depression of the landing
basic math in real world applications1. describe a real-world problem you have encountered in either your personal or
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