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The speed of a bobsled is increasing because it has anacceleration of 2.6 m/s2. At agiven instant in time, the forces resisting the motion, includingkinetic friction and air resistance, total 450 N. The mass of the bobsled and its riders is 255 kg.
a) What is the magnitude of the for cepropelling the boblsed forward?b) What is the magnitude of the net force that acts on the bobsled?
During an adiabatic process, the temperature of 3.92 moles of a monatomic ideal gas drops from 485 oC to 205 oC. For this gas, find (a) the work done by the system, (b) the net change in internal energy of the system, and (c) the net heat absorbed by..
The Pulse frequency of a person is 90 beats/min, Find the power of heart if the density of mercury is 13.6 X 10^3 kg/m^3 (g=10 m/s^2)
An early method of measuring the speed of light makes use of a rotating slotted wheel. A beam of light passes through one of the slots at the outside edge of the wheel, find the linear speed of a point on the edge of the wheel
A projectile is fired in such a way that its horizontal range is equal to 7 times its maximum height. What is the angle of projection
A string is wrapped tightly around a fixed pulley that has a moment of inertia of 0.0352 kg m2 and a radius of 12.5 cm. The string is pulled away from the pulley with a constant force of 5.00 N. As the string unwinds the pulley begins to rotate. What..
a bullet moving horizontally to the right (+x direction) with a speed of 500 m/s strikes a sandbagk, What is the average acceleration in m/s of the bullet
idetailed and elaborate responses to the following questions.nbsp your response to each should be a minimum of one
In a film of Jesse Owen's famous long jump in the 1936 Olympics, What minimum speed did he need at launch if he was also noted to be traveling at 6.5 m/s at the top of the arc
A cue ball, which has a mass of 0.17 kg, collides head on with a stationary 8 ball, what was the speed of the cue ball before and after collision
You are testing a new amusement park roller coaster with an empty car with mass 113 kg. calculate how much work is done by the friction
An archer puts a 0.26 kg arrow to the bowstring. An average force of 213 N is exerted to draw the string back 1.3 m. unless otherwise directed, suppose that air resistance is negligible. Illustrate energy bar graphs to solve the problem.
Given that the diameter of the moon is 3,480 km, and using a meter stick or tape measure plus a 25¢ coin, estimate the distance, D, from the Earth to the Moon
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