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Question1
A uniform bar is propped against an extremely slick vertical wall. The force of static friction between upper end of the bar and the wall is negligible, but bar remains at rest, in equilibrium. Which statement about bar is wrong?
Question2
A uniform horizontal bar of length L = 4.0 m and weight 120 N is pinned to a vertical wall and supported by a thin wire that makes an angle of θ = 34° with the horizontal. A mass M, with a weight of 330 N, can be moved anywhere all along the bar. The wire can withstand a maximum tension of 573 N. What is the greatest possible distance from the wall at which mass M could be placed before the wire breaks?
parachutist with a camera, both descending at a speed of 13 m/s, releases that camera at an altitude of 110-m.
Two particles with Q1 = 50 µC and Q2 = 79 µC are initially separated by a distance of 2.4 m, What is the change in the electric potential energy
Water flows straight down from an open faucet. The cross-sectional area of the faucet is 2.00 x10-4 m2, and the speed of the water is 0.87m/s as it leaves the faucet.
At the end of an amusement park ride, you want the gondola to stop without the acceleration exceeding 2 g%u2019s. what is the maximum allowed braking force
Two bicycle tires are set rolling with the same initial speed of 3.40m/s along a long, straight road, What is the coefficient of rolling friction r for the tire under low pressure
In a series R-L-C circuit, R= 300oms, Xc=300oms and XL=500 oms . The average power consumed in the resistor is 60.0 W. What is the power factor of the circuit
Photons of wavelength 490 nm are incident on a metal. What is the work function of the metal
One object is at rest, and another is moving. The two collide in a one-dimensional, completely inelastic collision. Determine the final speed of the two-object system
A 24-V battery is connected in series with a resistor and an inductor, Find the energy stored in the inductor when the current reaches its maximum value
The roof makes an angle of 23 degrees with the horizontal. If the edge of the roof is 10 meters high, clarify how far from the base of the house the basketball hits.
A 29 kg board 3.2 m long is supported in a horizontal position at the two ends. A 77 kg worker stands 1.4 m from one end. What forces are exerted by the board on the two support points
In the quark model of fundamental particles, a proton is composed of three quarks: two "up" quarks, each having charge +2e/3, calculate the potential energy of the subsystem of two "up" quarks
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