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a block is pushed across a rough horizontal surface by a horizontal force of magnitude P= 25 . The coefficient of kinetic friction between the block and the ground is 0.3 if the blck started from rest , what is its velocity when it reaches a point 3 meters away. The mass of the block is 4 kg.
A 19.8 kg block is dragged over a rough, hor- izontal surface by a constant force of 180 N acting at an angle of angle 32.8? above the horizontal. Find the work done by the normal force
Is it safe to use zero for the initial velocity in equations?
A rock of mass 47 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 252 N. Determine the magnitude of the acceleration of the rock
Donovan Bailey set a world record for the 100-m dash on July 27, 1996. If observers on a spaceship moving with a speed of 0.7705 c relative to Earth saw Donovan Bailey's run
Physicist Robert Adair, once appointed the "official physicist to the National League" by the commissioner of baseball, What is the difference in wavelength of these sounds
A capacitor has a capacitance of 2.48 10-8 F. In the charging process, how many electrons have been transferred
Two geekie physics students with a combined mass of 122 kg jump into their old car to run out for some late night pizza. What is mass of the car
A grinding wheel is a uniform cylinder with a radius of 8.5 cm and a mass of .580 kg. Calculate its moment of inertia about its center
A small object with a mass of 360 mg carries a charge of 30.0 nC and is suspended by a thread between the vertical plates of a parallel-plate capacitor. The plates are detached by 2.40 cm. If the thread makes an angle of 17.0° with the vertical, what..
Suppose two kids get on a 4 meter long teeter-totter. The one on the right creates a CW torque of 350 Newton-meters (Nm). Quite by coincidence, when the other kid sits at 1 meter from his end they balance perfectly. How much does second kid weigh.
A cylinder with a moveable piston contains 178 mL of nitrogen gas at a pressure of 1.22 atm and the temperature of 298 K. What should the final volume be for the pressure of the gas to be 1.52 atm at a temperature of 335 K.
A 3.50-m-long, 360kg steel uniform beam extends horizontally from the point where it has been bolted to the framework of a new building under construction, What is the magnitude of the total torque due to the worker and the force of gravity
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