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Suppose a slide similar to Der Stuka is 38.8 meters high, but is a straight slope, inclined at 45° with respect to the horizontal.
(a) Find the speed of a 56.4 kg thrill seeker at the bottom of the slide, assuming no friction.
____
(b) If the thrill seeker has a speed of 24.6 m/s at the bottom, find the change in mechanical energy due to friction.
____J
(c) Find the magnitude of the force of friction, assumed constant.
____N
A cell membrane is composed of lipid molecules and approximately 11 nm thick, what is the approximate capacitance of a spherical cell that has a diameter of 11mu or micro m
An airplane takes off and flies 225 km on a course of 25 degrees north of west and then changes direction and flies 135 km due north where it lands. At what angle is the plane from the starting point
A quarterback makes a pass, throwing the ball at 22 m/s and an angle of 63° above the horizontal. What is the maximum height of the ball in flight
In one day, a 85 kg mountain climber ascends from the 1440 m level on a vertical cliff to the top at 2360 m. The next day, she descends from the top to the base of the cliff, which is at an elevation of 1310 m.
question1a uniform electric field of magnitude 642 nc exists between two parallel plates that are 4.06 cm apart. a
A flywheel rotates at 7200 rev/min when the power is suddenly cut off. How many revolutions does the flywheel makes before coming to rest
A spinning flywheel has rotational inertia I = 401.0 kg · m2. Its angular velocity decreases from 20.4 rad/s to zero in 261.6 s due to friction
This same battery is now connected to a 12 resistor. How much current flows through this resistor
For the polarisers, assume the incident light is linearly polarized, the transmitted intensity (through both polarisers) is 0.15×I0, and the axis of the second polarizer makes an angle θ=41° with the axis of the first polarizer. What is the angle (in..
A 8500-kg boxcar traveling at 13m/s strikes a second boxcar at rest. what is the mass of the second car
A car is driven 175km west and then 55km southwest. What is the displacement of the car from the point of origin (magnitude and direction).
Because of air resistance a constant torque exerted on the system to keep it spinning at that rate. Assuming that the air exerts a miniscule force on the stick (but a significant force on the ball), identify the force the air exerts on the ball.
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