Local fairs and amusement parks usually offer games in which you can win a large prize by performing a seemingly easy task. In many cases, these tasks are made surprisingly difficult by simple physical principles and few people receive prizes.
A. You are asked to throw a basketball into a shallow basket that is tipped toward you. Whenever you throw the ball into the basket, it bounces back out of the basket and falls onto the floor. How could this rebound be minimized when it is thrown?
B. A glass plate is on a post and you are asked to throw a coin so that it lands on the plate. Why do the coins slide off the plate instead of stay?
C. A fair game of skill is trying to climb a ladder that is suspended between two points and reach up to ring a bell. The rope ladder is set to be climbed almost horizontally instead of vertically. Why is net force a critical element of being successful in this challenge?
D. What human internal force must be overcome to beat this challenge?
2.High rise cranes are often in the news for falling. Wind shear and other factors can contribute to the falls, but stress and strain can also contribute to snapping of crane parts.
How does a climbing tower crane maintain balanced stability even though it increases in height?
a.What is an outrigger and how does it stabilize a crane?
b.How do pulleys increase the amount of weight that can be lifted by these cranes?
c.How does oxidation increase metal fatigue?
3.A wheel has a number of factors and forces that can be seen during movement
a.What happens if you used the wrong bike tire for the environment (a racing bike tire on a mountain trail, a mountain bike tire on the street)?
b.Because a wheel creates gyroscopic motion why does a car wheel need to be balanced??
c.How do ball bearings reduce friction, and why would a mechanic suggest that you have your bearings repacked?
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