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Q. A massive steel cable drags a 25-kg block across a horizontal, frictionless surface. A 90.0 N force applied to the cable causes the block to reach a speed of 4.5m/s in 1.5s. What is the difference in tension between the two ends of cable?
How fast (in ) must a centrifuge rotate if a particle 5.4 from the axis of rotation is to experience the acceleration of 300000 's.
What voltage is required to charge a parallel combination of the two capacitors to the equal total energy.
A baseball pitcher can throw a ball with a speed of 70m/s. He is in the back of a pickup truck that is driving away from you. He throws the ball in the direction, and it floats toward you at a lazy 10 m/s.
An athlete executing a long jump leaves the ground at a 35° angle and lands 7.30 m away.
A 10.0g bullet is fired horizontally into a 101g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring having spring constant 141 N/m. The bullet becomes embedded in the block. If bullet-block system co..
At first the spacecraft and the asteroid are at rest, 450m apart. How much time does it take for the ship and the asteroid to meet?
A boulder has 300J of potential energy sitting on the edge of cliff. What is the boulder's kinetic energy as it hits the ground.
A 75 kg person escapes from a burning building by jumping from a window 25-m above a catching net. Assuming that air resistance exerts a 95-N force on the person all through the fall, determine out the person's velocity just before hitting the net..
Determine the efficient spring constant of the molecule
What is the intensity of the sound waves at point.
while the other terminal of the ammeter is connected to the other wire, ammeter shows that the current through the wire is 1 A. You then disconnect everything and travel to the other end of the telephone line, where you repeat the process and find ..
How much greater is an angular momentum of the Earth orbiting about the sun than the moon orbiting about the Earth? (Set up a ratio of angular momenta using data on inside back cover. The period of the moon is about 27.3 days.)
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