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A tightrope walker who weighs 640 N walks along a steel cable. When he is halfway across, the cable makes an angle of .040 rad below the horizontal. (a) What is the strain on the cable? Assume the cable is horizontal with a tension of 80 N before he steps onto it. Ignore the weight of the cable itself. (b) What is the tension in the cable when the tightrope walker is standing at the midpoint? (c) What is the cross-sectional area of the cable? (d) Has the cable been stretched beyond its elastic limit (2.5x10^8 Pa)?
What is the maximum distance the center of the coin can be placed from the axis if the turntable rotates at 47.9 rev/min
A spring-loaded cannon is able to throw a 2.0-kg pumpkin 10 m vertically upward when the spring was initially compressed by 0.25 m. How fast is the pumpkin when it crashes into the field
A bomb mass 7.2 kg goes off and splits into 3 pieces. The first piece has a mass of 1.1 kg and velocity of 9.5 m/s. What is the magnitude and direction of the velocity of the third piece
A 5.0 deep swimming pool measures 30 by 16. What force does the water exert on the bottom of the pool
What must the constant acceleration of the car be after the brakes are applied so that the car would come to rest at the stop sign.
What is speed of the second train, which travels faster
You have decided to make a large cooler to store meat. Calculate the net rate of heat flow per second out of the cooler if the interior temperature is 5 C and the exterior temperature can be 45 C
A horizontal force of magnitude 46.1 N pushes a block of mass 3.64 kg across a floor where the coefficient of kinetic friction is 0.554. find the increase in the kinetic energy of the block
A laser beam is incident at an angle of 29.2° to the vertical onto a solution of corn syrup in water. what is the index of refraction of the syrup solution
In a chase scene, a movie stuntman is supposed to run right off flat roof of one city building and land on another roof 1.7m lower. If the gap between the buildings is 4.4m wide, how fast must he run.
sometimes a person cannot clearly see objects close up or far away. to correct this type of vision bifocals are often
A particle of mass 4m is placed at a distance of 2.00 m from another particle of mass m. how far will that be orbiting around the earth
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