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A car is moving at 20 m /?s before it applies the brakes for 4 s. It slows at a constant rate to 10 m /?s. Five seconds after this, the brakes are applied again and stop the car in 5 seconds. The car slows at a constant rate during this period of time as well. What is the total distance the car travels from the moment the brakes were first applied to the moment it stops?
For a damped oscillator with a mass of 210 gram, a spring constant 57 N/m and a damping coefficient of 72 g/s, find the ratio of amplitude of damped oscillations to initial amplitude at the end of 14 cycles
Compute the force a piano tuner applies to stretch a steel piano wire 8.00 mm, if the wire is originally 0.850 mm in diameter and 1.35 m long.
a 0.39-kg object connected to a light spring with a force constant of 20.2 nm oscillates on a frictionless horizontal
Assuming a two-wire line of 0.62-cm-diameter copper wire, estimate the cost of the energy lost to heat per hour per meter. Assume the cost of electricity is about 12 cents per kWh. The resistivity of copper is 1.68×10-8Ω⋅m.
A 2 liter aluminum cylinder at 5 °C is filled to the brim with gasoline at the same temperature. If the aluminum and gasoline are warmed to 60 °C, how much gasoline spills out.
Three men are riding on a train of proper length L that is moving at speed v = 3/5 c with respect to the ground, Calculate the time difference between the two emissions, in both frames
Calculate the amplitude at point on the string a distance of 17.0 cm from the left-hand end of the string
An object is dropped from a height 622 km above Earth's surface. What is its initial acceleration in terms ofg, the acceleration constant due to gravity at Earth's surface?
How much quadriceps muscle force is being generated?
Spider silk has a Young's modulus of 4.0x10^9 N/m^2 and can withstand stresses up to 1.4x10^9 N/m^2. If the web is 0.10 m in radius, how far down does the web extend
A virtual image is formed 21.0 cm from a concave mirror having a radius of curvature of 34.5 cm. What is the magnification of the mirror
a 0.5kg block at rest on a table is attached to a horizontal spring with a spring constant k200 nm. the spring is
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