A 1250-kg wrecking ball is lifted to a height of 12.7 m above its resting point. When
Question:
(a) What is the potential energy of the wrecking ball at a height of 12.7 m?
(b) What is its kinetic energy as it strikes the wall?
(c) If the wrecking ball transfers all of its kinetic energy to the wall, how much force does the wrecking ball apply to the wall?
(d) Why should a wrecking ball strike a wall at the lowest point in its swing?
Step by Step Answer:
a U mgh 1250kg980m s 2 127m 156 x 10 5 J b U top K botto...View the full answer
Applied Physics
ISBN: 978-0132109277
10th Edition
Authors: Dale ewen, Neill schurter, P. erik gundersen
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Skateboarding is a fun and popular activity among young people, in which the participant stands on a small board with wheels and navigates different surfaces. It is considered an extreme sport and there are professional competitions for different disciplines like vertical and street skating. To start skateboarding, focus on maintaining balance and having fun. To control the board, use your feet and keep your body\'s center of mass over the skateboard. The most stable and safest riding position is to have your front foot just behind or on the front bolts of the board and your back foot close to the back of the board, near or on the heel. This position also makes quick kick turns easier. Once you have mastered the basics, you can learn various tricks to impress others. In terms of mechanics, skateboarding involves the principles of force and torque. The rider exerts force on the skateboard to make it move, and torque is used to turn the board or perform tricks. Friction between the wheels and the ground also plays an important role in allowing the rider to control the speed and direction of the board. Energy is also involved in skateboarding, specifically the transfer of potential energy to kinetic energy. When a rider jumps on a skateboard, they transfer potential energy stored in their muscles into kinetic energy, which propels the board forward. The rider can also transfer kinetic energy into potential energy by performing an aerial trick and then landing back on the board.
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