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The speed of a bobsled is increasing because it has an accelerationof 2.4m/s^2. At a given instant in time, the forces resistingthe motion, including kinetic friction and air resistance, total450 N. The mass of the bobsled and its riders is 270kg. What is the magnitude of the net force that acts on the bobsled?
a. 200 Nb. 650 Nc. 1100 Nd. 450 Ne. 980 N
a 20 kg mass sits on an inclined plane with friction making an angle of 50 degrees with respect to the horizontal. calculate the frictional force required to keep the mass from sliding down the incline
The sun radiates energy at the rate of approximately 3.80 x 1026 W. Calculate the sun's loss of mass per day
A typical decibel level for a buzzing mosquito is 40 dB and normal conversation is approximately 50 dB. How many buzzing mosquitoes will produce a sound intensity equal to that of normal conversation?
A high-speed flywheel in a motor is spinning at 500rpm when a power failure suddenly occurs. The flywheel has mass 35.0kg and diameter 73.0cm. At what rate is the flywheel spinning when the power comes back on
A circular area with a radius of 7.40 lies in the x-y plane. What is the magnitude of the magnetic flux through this circle due to a uniform magnetic field B= 0.232 T that points in the +z direction?
A series RLC circuit with R = 43 Ohms , L = 270 mH , Find the maximum frequency of the frequency range over which the peak current will exceed half its value at resonance
An eagle glides in a diretion parallel to the ground, maintaining a constant velocity of 5.81 m?s^2. What are the new speed and direction
Two astronauts of equal mass 76 kg are holding on to opposite ends of a straight rope in space. The length of the rope between them is 18 meters. What is the new angular velocity of the two astronauts
A proton moving freely in a circular path perpendicular to aconstant magnetic field takes 1.00μs to complete onerevolution. What is the magnitude and magnetic field
Calculate the cenrtripetal acceleration of the Earth in itsorbit around the Sun, and the net force exerted on the Earth. What exerts this force on the Earth
A 7.75 H inductor with negligible resistance is placed in series with a 15.7 V battery, a 3.00 ? resistor, and a switch. The switch is closed at time t = 0 seconds. Calculate the current as time approaches infinity
A rock is suspended from the string and moves downward at constant speed. Which statement is true concerning the tension in the string if air resistance is ignored.
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