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A 5.27-kg object passes through the origin at time t = 0 such that its x component of velocity is 4.95 m/s and its y component of velocity is -3.03 m/s. (a) What is the kinetic energy of the object at this time? J (b) At a later time t = 2.00 s, the particle is located at x = 8.50 m and y = 5.00 m. What constant force acted on the object during this time interval? magnitude (c) What is the speed of the particle at t = 2.00 s? m/s
A bicycle has wheels with a diameter of 0.680 m. It accelerates uniformly and the rate of rotation of its wheels increases from 211 rpm to 280 rpm in a time of 28.9 s. Find the linear (tangential) acceleration of the rim of the bicycle's wheels..
Using the capacitance determined in part (a), calculate the current in the circuit 7.4 ms after the switch is closed. Suppose that the capacitor is uncharged initially and that the emf of the battery is 9.0 V
Starting from one oasis, a camel walks 25 km in a direction 30 degrees south of west and then walks 30 km toward the north to a second oasis
A parallel plate capacitor has a potential difference between the plates of 80 V. If the charge on one of the plates of the capacitor is +8.0 ?C, what is the electrical energy stored by this capacitor
An object is subject to a restoring force F = 8x3, How much work must be done to move the object from x = 0.10 to x = 0.47 m
At a carnival, you can try to ring a bell by striking a target with a 10.3-kg hammer. How fast must the hammer be moving when it strikes the target so that the bell just barely rings
The force on a long wire is a maximum of 6.20 10-2 N when placed between the pole faces of a magnet. What type of magnetic pole is the top pole face
A sealed cubical container 22.0 cm on a side contains three times Avogadro's number of molecules at a temperature of 20.0°C
A manager of a restaurant pushes horizontally with a force of magnitude 150 N on a box of melons. The box moves across the floor with a constant acceleration in the same direction as the applied force.
A fish takes the bait and pulls on the line with a force of 1.8 N. The fishing reel, which rotates without friction, What is the angular acceleration of the fishing reel
An 8.00-mH inductor and a 2.00ohm resistor are wired in series to an ideal battery. A switch in the circuit is closed at time 0, at which time the current is 0. determine the time constant for the circuit
A trained dolphin leaps from the water with an initial speed of 12. What is the vertical distance between the dolphin and the ball when the dolphin reaches the horizontal position of the ball
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