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Some European trucks run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 200π rad/s. One such flywheel is a solid, uniform cylinder with a mass of 450 kg and a radius of 1.5 m. (a) What is the kinetic energy of the flywheel after charging? 1___________ J (b) If the truck operates with an average power requirement of 10.0 kW, for how many minutes can it operate between chargings? 2 min
A 2.10-kg block is suspended from a spring with a spring constant of 480.0 N/m. What fraction of the original kinetic energy of the bullet appears as mechanical energy in the system of block-spring-bullet
A race track is to have a banked curve with radius250 m. What should be the angle of the bank if the normal force alone is to allow safe travel around thecurve at 59.5 m/s
Proton one moves twice as fast as proton two. The magnitude of the magnetic field in which proton one is immersed is twice the magnitude of the magentic field in which proton two is immersed.
q1. a child is sliding on a sled at 1.6 rm ms to the right. you stop the sled by pushing on it for 0.80 rm s in a
you are on the moon and would like to send a probe into space so that it does not fall back to the surface of the moon. what launch speed do you need
The infamous chicken is dashing toward home plate with a speed of 5.6m/s when he decides to hit the dirt. The chicken slides for 1.0s , just reaching the plate as he stops (safe, of course).
a beam of light in air is incident on the surface of a slab of fused quartz. part of the beam is transmitted into the
A 60kg astronaut is on a space walk away from the shuttle whenthe tether line breaks. determine the maximum distance she can be from the craft
in the x-y plane a charge of -4.6 uc is on the x-axis at the point -30cm0 and a second charge of 7.2 uc is located on
A woman walks for 4 min directly north with a average velocity of 6 km/h; then she walks eastward at 4 km/h for 10 min. What is the magnitude of her average velocity
the following four expressions are representing simple harmonic motion in one dimension.a. xtc1ejwt c2-ewtb. xt b1
A steel rod of mass m and length L has the linear expansion coefficient X. It is standing vertically and supports a box of mass M on its top. what is the heat capacity of the rod for this process
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