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A 2.5 kg particle-like object moves in a plane with velocity components vx = 40 m/s and vy = 65 m/s as it passes through the point with (x, y) coordinates of (3.0, -4.0) m What is its angular momentum relative to the origin at this moment What is its angular momentum relative to the point (-2.0, -2.0) m at this same moment.
Two identical small insulating balls are suspended by separate 0.22-m threads that are attached to a common point on the ceiling. Determine the tension in the threads
A kite is hovering over the ground at the end of a straight 44-m line. The tension in the line has a magnitude of 15 N. Find the height of the kite
A solenoid 90.0 cm long has a radius of 2.90 cm and a winding of 1000 turns; it carries a current of 3.60 A. Calculate the magnitude of the magnetic field inside the solenoid
What is the magnitude of an object's average velocity if an object moves from a point with coordinates x = 2.54 m, y = -3.56 m to a point with coordinates x = 7.85 m, y = -6.54 m in a time interval of 2.02 s.
Coil 1 has L1 = 47 mH and N1 = 104 turns. Coil 2 has L2 = 68 mH and N2 = 215 turns. The coils are fixed in place; what self-induced emf appears in that coil
A solar cell generates a potential difference of 0.1556 V when a 500 ? resistor is connected across it, and a potential difference of 0.2270 V when a 1000 ? resistor is substituted. What is the internal resistance of the solar cell?
An unmarked police car travelling a constant 85 km/h is passed by a speeder travelling 145km/h. Precisely 1s after the speeder passes, police officer steps on the accelerator.
If we observe a stars spectrum and find that the peak power occurs at the border between blue and ultraviolet light, what is the surface temperature of the star in Celsius
A wheel experiences a time dependant angular acceleration given by ?(t) = 3 + 0.333t^3. Derive an expression for the angular velocity as a function of time
A projectile is shot at an angle of 60 degrees to the horizontal near the surface of the earth but in the absence of air resistance. The initial launch speed of the projectile is what
In a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. Find the magnitude of the total acceleration of the ball
A lightweight electric car is powered by ten 12-V batteries, What must be the power of the electric motor if the car is to travel at a speed of 90 km/h
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