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A gymnast with mass m1 = 41 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 107 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end of the beam.
What is the force the right support exerts on the beam?
How much extra mass could the gymnast hold before the beam begins to tip?
Now the gymnast (not holding any additional mass) walks directly above the right support.
What is the force the left support exerts on the beam?
An electron and a proton each have a thermal kinetic energy of 3×kBT/2. Compute the de Broglie wavelength of each particle at the temperature of 2050 K. (kb is Boltzmann's constant, 1.38×10-23 J/K).
What is the linear charge density together the arc.
Treating the pulley as a uniform disk, determine the speeds of the two objects as they pass each other.
A horizontal force of 750 N is needed to overcome the force of static friction between a level floor and a 250 kg crate. What is the acceleration of the crate if the 750 N forces is maintained after the crate begins to move and coefficient of kine..
If an average frequency emitted by a 200,-,rm W light bulb is 5.00 times 10^{14} , {rm Hz}, and 10.0 percent of the input power is emitted as visible light, approximately how many visible-light photons are emitted per second .
A particle moving along the x axis in simple harmonic motion starts from its equilibrium position, the origin, at t = 0 and moves to the right. The amplitude of its motion is 1.70 cm and the frequency is 1.30 Hz.
Shaving/makeup mirrors typically have one flat and one concave (magnifying) surface. What is the focal length of the mirror
A farmer planted a field of Bt 123 corn and wants to estimate the yield in terms of bushels per acre. He counts 22 ears in 1/1000 of an acre. He determines that each ear has about 700 kernels on average. He also knows that the bushel contains abou..
If a mass of 1 kg is accelerated 1 m/s2 by a force of 1 N, illustrate what would be the acceleration of 10 kg acted on by a force of 20 N?
A 40g ball of clay traveling east at 2.0m/s collides and sticks together with a 60g ball of clay traveling north at 1.0m/s
The box is open at the top and has edge length L = 66 cm. Find out (a) the x coordinate, (b) the y coordinate, and (c) the z coordinate of the center of mass of the box.
Two positive point charges, each 17? C, lie along the x-axis at x = –0.12m and x = +0.12m.
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