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One end of a cord is fixed and a small 0.440-kg object is attached to the other end, where it swings in a section of a vertical circle of radius 1.50 m, as shown in the figure below. When ? = 17.0°, the speed of the object is 4.10 m/s.
What is the tension of the string at this moment?
Speedboat A negotiates a curve whose radius is 198 m. Speedboat B negotiates a curve whose radius is 290 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
A 202 kg cart runs into the rear end of a 103 kg cart that is stationary. what is the speed of the cart before collision
A 43.0kg seal at an amusement park slides from rest down a ramp into the pool below. what is the work done by kinetic friction
A square with sides of length L has a point charge at each of its four corners. Find the magnitude and sign of the charges Q such that each of the +1.00 µC charges experiences zero net force
A block of mass m = 8 kg is pushed across a rough table with a force applied at an angle of 40 with respect to the horizontal direction, what is the work done by friction
Two particles are fixed to an x axis: particle 1 of charge -4.18 × 10-7 C is at the origin and particle 2 of charge +4.18 × 10-7 C is at x2 = 13.9 cm. what is the magnitude of the net electric field
Two identical aluminium objects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at the higher potential.
If the current in the circuit is 0.15 A and the resistances are R1 = 100 ? and R2 = 260 ?, what is the emf of the battery.
A barge is 15.0 m wide and 75.0 m long and has vertical sides. The bottom of the hull is 1.20 m below the water surface. What is the weight of the barge
Two sinusoidal waves, identical except for phase, travel in the same direction along a string, producing the net wave y(x,t)=(6.5 mm)sin(28.0x -4.0 s-1 * t+0.350 rad),with x in meters and t in seconds. what is the resultant amplitude of the two wa..
A 20g ball of clay traveling east at 3.0m/s collides, What is the speed of the resulting ball of clay
A charge of -5 micro-coulombs is placed at x = 0 cm, y = 0 cm. Another charge of -5 micro-coulombs is placed at x = +22 cm, y = -50 cm. When measured counter-clockwise from the x axis, what angle is the electric force vector acting on the charge a..
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