Defining Mechanical Advantage and Efficiency

Mechanical advantage is the ratio of

Efficiency is the ratio of

expressed as a percentage.

Intro

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Activity

1. You must park at least away from a fire hydrant. A. 5 ft B. 10 ft C. 15 ft D. 20 ft

The Internet may best be compared to a/an a. large network of roads. b. loud truck motor. c. series of colored lights. d. enormous skyscraper.

Two organ pipes, both open at one end but closed at the other, are each 1.14 m long. One is now lengthened by 2 cm. Find the frequency of the beat they produce when playing together in their fundamental frequencies. A) 0.9 Hz B) 3.4 Hz C) 2.

A duck waddles 2.5 m east and 6.0 m north. what are the magnitude and direction of the duck's displacement with respect to its original position?

How is the electromagnetic force different than both the gravitational force and the strong nuclear force? It has an infinite range. It acts at the subatomic level. It is repulsive. It holds protons together.

the half-life of carbon - 14 is 5730 years. What fraction of carbon-14 would remain after 11,460 years?

An object with a mass of 10.9 kg experiences a force of 18.53 N. What is the acceleration of the object? A. 2.2 m/s2 B. 1.7 m/s2 C. 16.83 m/s2 D. 1.3 m/s2

A proton, starting from rest, accelerates through a potential difference of 1.0 kV and then moves into a magnetic field of 0.040 T at a right angle to the field. What is the radius of the proton's resulting orbit

Which of the following terms are needed to completely describe speed? Check all that apply. A. Units B. Direction C. Number D. Mass

Drivers are able to see objects ahead of them because light travels through windshields.