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In San Francisco a very simple technique is used to turn around a cable car when it reaches the end of its route. The car rolls onto a turntable, which can rotate about a vertical axis through its center. Then, two people push perpendicularly on the car, one at each end, as in the figure. The turntable is rotated one-half of a revolution to turn the car around. If the length of the car is 9.25 m and each person pushes with a 185-N force, what is the magnitude of the net torque applied to the car?
In a CRT tube, electrons are accelerated by a 20,000 V potential difference between the electron gun (the cathode) and the positive metal mesh 5.00 cm away. How much time does it take the electron to reach the wire mesh
A single circular loop of radius 0.24m carries a current of 2.7A in a magnetic field of 0.96T .What is the maximum torque exerted on this loop?T=_____ N*m
A 73.0 kg construction worker stands at the far end of the beam.What is the magnitude of the torque about the point where the beam is bolted into place .
A machine gun fires 23 g bullets horizontally at 260 m/s at a constant rate of 30 bullets/s. what is the average force exerted on the door
Compute the linear momentum and angular momentum of a Frisbee of mass 0.144 kg if it has a linear speed of 1.75 m/s and an angular velocity of 64.0 rad/s
A 80 kg man is ice-skating due north with a velocity of 6.0 m/s when he collides with a 35 kg child. What is the direction of the child's velocity just before the collision
A block is moved down an incline a distance of 5.0m from point A to point B by a force F that is parallel to the incline and has a a magnitude of 2.0 N
Three moles of an ideal monatomic gas expands at a constant pressure of 2.90atm ; the volume of the gas changes from 3.00×10?2m3 to 4.40×10?2m3. Calculate the amount of work the gas does in expanding
A beetle 4.80mm is examined with magnifier of focal length 10.3 cm. what is the apparent length of the beetle
Assume that an inexpensive watch runs 0.004% slower than a "perfect watch" (viz., a "time standard") that neither loses nor gains time, what would the perfect watch measure for this time interval
You are given a pendulum composed of a 0.024 kg mass on the end of a 0.60 m long massless string. Find the gravitational potential energy of the mass
a car is moving down a street at 55 kmh. a child suddenly runs into the street. if it takes the driver 0.75 s to react
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