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Suppose that a simple pendulum consists of a small 61 g bob at the end of a cord of negligible mass. If the angle ? between the cord and the vertical is given by ? = (0.048 rad) cos[(7.7 rad/s) t + ?], what are
(a) the pendulum's length and
(b) its maximum kinetic energy?
Two identical balls are traveling toward each other with velocities of -4.1 m/s (ball A) and +9.5 m/s (ball B), Obtain the velocities (magnitude and direction) of balls
Now assume the particle is a proton and that its initial velocity is 254.7 m/s to the right. If the magnitude of the magnetic field is 0.98 T
If the wire is heated to 40.0°C while the 7.0-V potential difference is maintained, what is the resulting current in the wire
a 3 kg mass attached to a spring oscillates with a period of 0.5 seconds and amplitude of 1/4 meter. find the maximum speed of the mass
The rocket attains its launch speed in a negligibly short period of time, after which its engines shut down and the rocket coasts. Explain by how much does the rocket clear the top of the wall?
A large air conditioner has a resistance of 8.0?and an inductive reactance of 14. Find the average power consumed by the air conditioner
zorch, an arch enemy of superman, decides to slow earth's rotation to once per 27.0 h by exerting an opposing force at, How long must zorch push with this force to achieve his goal
A .14kg baseball with an initial speed of 28m/s rebounds with a speed of 34m/s after being struck with a bat. What was the average force between ball and bat
A projectile is fired with an initial speed of 36.2m/s at an angle of 41.1 degrees above the horizontal on a long flat firing range. determine maxiumum height reached by projectile
Block 1, of mass m1 = 1.70kg , moves along a frictionless air track with speed v1 = 25.0m/s, Find the magnitude pi of the total initial momentum of the two-block system
A block weighing 60.0 N rests on a plane inclined at 25.0° to the horizontal. A force F is applied to the object at 44.0° to the horizontal, pushing it upward on the plane. The coefficients of static and kinetic friction between the block and the pla..
If a curve with a radius of 85 m is properly banked for a car travelling 68 km/h, what must be the coefficient of static friction for a car not to skid when travelling at 97 km/h.
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