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Pendulum. A small rock with mass 0.22 kg is fastened to a massless string with length 0.70 m to form a pendulum. The pendulum is swinging so as to make a maximum angle of 45° with the vertical. Air resistance is negligible.
a) What is the speed of the rock when the string passes through the vertical position?b) What is the tension in the string when it makes an angle of 45° with the vertical?c) What is the tension in the string as it passes through the vertical?
The coefficients of static and kinetic friction between a 524crate and the warehouse floor are 0.665 and 0.320, respectively. find the acceleration of the crate after it has begun to move
A rubber balloon is filled with 1 L of air at 1 atm and room temperature. what is the new volume of the balloon
a disk with rotational inertia i rotates like a merry-go-round while undergoing a torque given by t 5 2t with t in n
A skier starts at the top of a hill angled at 30 degrees from the horizontal. The hill is 100 meters long. how fast is he going when he reaches the bottom of the hill
Steam enters an insulated pipe at 200 kPa and 200 degrees C and leaves at 250 kPa and 150 degrees C. The inlet-to-outlet diameter ratio for the pipe is D1/D2=1.80. Determine the inlet and exit velocities of the steam.
q1. the position of a pinewood derby car was observed at various times the results are summarized in the following
A concrete block of msss 10kg is pulled 7.0m across a frictionless surface by means of a rope and the net work done on the block is 220J. obtain the magnitude of the normal force acting on the block
A factory worker pushes a 28.6 kg crate a distance of 4.9 m along a level floor at constant velocity by pushing downward at an angle of 32 degrees below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.26. How m..
The voltage in typical household wiring is 120 V. How much current does a 100 W lightbulb draw? What's the bulb's resistance under these conditions? The filament in the lightbulb has a diameter of 0.050 mm. What is the current density in the filam..
Over a time interval of 1.92 years, the velocity of a planet orbiting a distant star reverses direction, changing from +19.7 km/s to -19.1 km/s.
Ladder 6.55 m long leans against the side of a building. If the ladder is inclined at an angle of 65.5° to the horizontal, what is the horizontal distance from the bottom of ladder to the building.
The temperature of 1.3mol of an ideal diatomic gas goes from 20?C to 57?C at a constant volume. What is the change in entropy
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