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Chapter 10: Q.13 (page 256)
A cannon tilted up at a angle fires a cannon ball at from a top a -high fortress wall. What is the ball鈥檚 impact speed on the ground below?
Ball's impact speed on the ground
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In , what is the maximum speed of a particle that oscillates between ?
Sam, whose mass is , straps on his skis and starts down a -m-high, frictionless slope. A strong headwind exerts a horizontal force of N on him as he skies. Use work and energy to find Sam鈥檚 speed at the bottom.
A block sliding along a horizontal frictionless surface with speed v collides with a spring and compresses it by 2.0 cm. What will be the compression if the same block collides with the spring at a speed of 2v?
You have a ball of unknown mass, a spring with spring constant , and a meter stick. You use various compressions of the spring to launch the ball vertically, then use the meter stick to measure the ball鈥檚 maximum height above the launch point. Your data are as follows:
Use an appropriate graph of the data to determine the ball鈥檚 mass.
It鈥檚 your birthday, and to celebrate you鈥檙e going to make your first bungee jump. You stand on a bridge above a raging river and attach a -long bungee cord to your harness. A bungee cord, for practical purposes, is just a long spring, and this cord has a spring constant of . Assume that your mass is . After a long hesitation, you dive off the bridge. How far are you above the water when the cord reaches its maximum elongation?
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