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A model airplane with mass 0.757 kg is tethered to the ground by a wire so that it flies in a horizontal circle 29.7 m in radius. The airplane engine provides a net thrust of 0.798 N perpendicular to the tethering wire. (a) Find the magnitude of the torque the net thrust produces about the center of the circle. 1 N · m (b) Find the magnitude of the angular acceleration of the airplane. 2 rad/s2 (c) Find the magnitude of the translational acceleration of the airplane tangent to its flight path.
A child in a boat throws a 5.20 kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 26.0 kg and that of the boat is 40kg.
A fire truck has a siren with that generates a sound with a frequency of 6686 Hz. what frequency will you observe
In the bohr model of the hydrogen atom, an electron is the 6th excited state moves at a speed of 60km/s in a circular path having a radius of 2mm.
A point charge (m = 1.0 g) at the end of an insulating string of length 53 cm (Fig. 16-66) is observed to be in equilibrium in a uniform horizontal electric field of E = 9500 N/C, when the pendulum's position is as shown in Fig. 16-66, with the charg..
A voltage ?v = (110 V) sin ?t (in SI units) is applied across a series combination of a 1.92 H inductor, a 12.5 µF capacitor, and a 12.8 O resistor. Calculate the power at that frequency
You need to make a series ac circuit having a resonance angular frequency of 1550rad/s using a 142 ohm resistor, a 10. microF capacitor, and an inductor. What should be the inductance of the inductor
A 7350 kg satellite has an elliptical orbit. The point on the orbit that is farthest from the earth is called the apogee and is at the far right side of the drawing. Find the work done by the gravitational force when the satellite moves from the ap..
a pottery wheel is rotating initially with an angular velocity of 4.0rad/s clockwise. find the direction of the angular acceleration of the wheel
A 2.6-kg cart is rolling along a frictionless, horizontal track towards a 1.7-kg cart that is held initially at rest. What is the total momentum of the system of the two carts
0.97 L of 16C water is placed in a refrigerator. What is the refrigerator's coefficient of performance
A proton is accelerated from rest to 0.75c. Find the relativistic momentum of the proton moving at 0.75c.
A 1870 kg truck traveling north at 37 km/h turns east and accelerates to 52 km/h. (a) What is the change in the truck's kinetic energy? (b) What is the magnitude of the change in its momentum?
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