1-2. Derive the relationships stated in Eqs. 1.6, 1.7, and 1.8. the two ends. As we...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
1-2. Derive the relationships stated in Eqs. 1.6, 1.7, and 1.8. the two ends. As we will see, many of the limb movements of animals are performed by Class 3 levers. It can be shown from the conditions for equilibrium (see Appendix A) that, for all three types of levers, the force F required to balance a load of weight W is given by Wdi F = d2 (1.6) where di and d2 are the lengths of the lever arms, as shown in Fig. 1.9 (see Exercise 1-2). If di is less than d2, the force required to balance a load is smaller than the load. The mechanical advantage M of the lever is defined as 29 d2 W M = F (1.7) di Depending on the distances from the fulcrum, the mechanical advantage of a Class 1 lever can be greater or smaller than one. By placing the load close to the fulcrum, with di much smaller than d2, a very large mechanical advantage can be obtained with a Class 1 lever. In a Class 2 lever, di is always smaller than d2; therefore, the mechanical advantage of a Class 2 lever is greater than one. The situation is opposite in a Class 3 lever. Here d is larger than d2; therefore, the mechanical advantage is always less than one. Applied force d2 Fulcrum Fulcrum Fulcrum Force d, d2 Force d, Load Load Load Class 1 Class 2 Class 3 FIGURE 1.9 > The three classes of lever. Section 1.6 The Elbow 11 V1 Load L1 Applied force L2 V2 FIGURE 1.10 > Motion of the lever arms in a Class 1 lever. A force slightly greater than what is required to balance the load will lift it. As the point at which the force is applied moves through a distance L2, the load moves a distance L1 (see Fig. 1.10). The relationship between L1 and L2, (see Exercise 1-2) is given by L1 di (1.8) L2 d2 The ratio of velocities of these two points on a moving lever is likewise given by (1.9) 1-2. Derive the relationships stated in Eqs. 1.6, 1.7, and 1.8. the two ends. As we will see, many of the limb movements of animals are performed by Class 3 levers. It can be shown from the conditions for equilibrium (see Appendix A) that, for all three types of levers, the force F required to balance a load of weight W is given by Wdi F = d2 (1.6) where di and d2 are the lengths of the lever arms, as shown in Fig. 1.9 (see Exercise 1-2). If di is less than d2, the force required to balance a load is smaller than the load. The mechanical advantage M of the lever is defined as 29 d2 W M = F (1.7) di Depending on the distances from the fulcrum, the mechanical advantage of a Class 1 lever can be greater or smaller than one. By placing the load close to the fulcrum, with di much smaller than d2, a very large mechanical advantage can be obtained with a Class 1 lever. In a Class 2 lever, di is always smaller than d2; therefore, the mechanical advantage of a Class 2 lever is greater than one. The situation is opposite in a Class 3 lever. Here d is larger than d2; therefore, the mechanical advantage is always less than one. Applied force d2 Fulcrum Fulcrum Fulcrum Force d, d2 Force d, Load Load Load Class 1 Class 2 Class 3 FIGURE 1.9 > The three classes of lever. Section 1.6 The Elbow 11 V1 Load L1 Applied force L2 V2 FIGURE 1.10 > Motion of the lever arms in a Class 1 lever. A force slightly greater than what is required to balance the load will lift it. As the point at which the force is applied moves through a distance L2, the load moves a distance L1 (see Fig. 1.10). The relationship between L1 and L2, (see Exercise 1-2) is given by L1 di (1.8) L2 d2 The ratio of velocities of these two points on a moving lever is likewise given by (1.9)
Expert Answer:
Related Book For
Posted Date:
Students also viewed these physics questions
-
On January 1, 2023, Highland leased equipment to Larkin Company under a six-year noncancelable lease agreement. The following information about the lease and the equipment is provided: 1. Equal...
-
For the k-variable regression model, it can be shown that the variance of the kth (k = 2, 3, . . . , K) partial regression coefficient given in Eq. (7.5.6) can also be expressed as where Ï 2 y =...
-
It can be shown that for large x, with ¼ defined as in (14) of Sec. 5.4. (a) Graph Y n for n = 0, . . ., 5 on common axes. Are there relations between zeros of one function and extrema of...
-
What is the maximum height above ground that a projectile of mass 0.790 kg, launched from ground level, can achieve if you are able to give it an initial speed of 80.3 m/s?
-
For each of the following four debts amortized by equal payments made at the end of each payment interval, compute (a) The size of the periodic payments; (b) The interest paid, principal repaid, and...
-
Harris Corporation, a manufacturer of electronics and communications systems, uses a service department charge system to charge profit centers with Computing and Communications Services (CCS) service...
-
A person donates a bag of clothes to Goodwill completely unaware that there is valuable sterling silver in the bag. The clothing and silver are subsequently sold, for a very economical price, to...
-
1. How can Workout update its facility to attract new customers? What additional equipment or services would you suggest? How could something as simple as revising the layout help? 2. It is your job...
-
Discuss the importance of an object-oriented database. How does it differ from the relational model?
-
Use information on the endpapers of this book to calculate the average density of the Earth. Where does the value fit among those listed in Tables 1.5 and 14.1? Look up the density of a typical...
-
Michael, a licensed insurance agent, meets with Jill, a prospectivernclient. After completing a needs analysis and discussing various options, Jill has decided to purchase a 10-year term policy from...
-
Bigger Company owns all of the issued capital of Smaller Company. The financial statements of Bigger Company and Smaller Company at 30 June 2023 are as follows: Bigger Company acquired its 100 per...
-
Your brother-in-law, Bil, fancies himself quite an investor, and he knows your sister, Hermana, also has "a bit of an interest in the markets." So, he wants you to settle a dispute between them as to...
-
Zabad is 33 years old. He is married to Zared. Zared is 26 years old. During the current year of assessment Zabad earned the following income: foreign dividends of R72 000 from a foreign company in...
-
3. A Domestic Corporation pays royalty to a Foreign Corporation but it withholds a tax lower than Philippine tax laws based on a treaty. What document need be presented to prove the imposition of a...
-
ANSWER THE FOLLOWING QUESTION WITH A CLEAR SOLUTION AND FORMAT. Problem 10.113TH MONTH PAY AND OTHER BENEFITS Jonathan, a purely employed taxpayer, received the following during the taxable year....
-
You are preparing pro forma financial statements for 2 0 2 1 using the percent - of - sales method. Sales were $ 1 0 0 , 0 0 0 in 2 0 2 0 and are projected to be $ 1 2 0 , 0 0 0 in 2 0 2 1 . Net...
-
How do network effects help Facebook fend off smaller social-networking rivals? Could an online retailer doing half as much business compete on an equal footing with Amazon in terms of costs? Explain.
-
Perform the indicated calculations. a. 2 + 2 + 2 in Z3 b. 2 2 2 in Z3 c. 2(2 + 1 + 2) in Z3 d. 3 + 1 + 2 + 3 in Z4 e. 2 3 2 in Z4
-
Let S : V W and T: U V be linear transformations. (a) Prove that if S and T are both one-to-one, so is S T. (b) Prove that if S and T are both onto, so is S T.
-
In Exercises, find all possible values of rank (A) as a varies. a. b. 7 A=1-2 4a2 L a 2 1 231
-
What are the functions of activator proteins and repressor proteins in transcription? Explain how these proteins work at the molecular level.
-
The gene that encodes the enzyme called tyrosine hydroxylase is known to be activated by the CREB protein. Tyrosine hydroxylase is expressed in nerve cells and is involved in the synthesis of...
-
The binding of small effector molecules, protein-protein interactions, and covalent modifications are three common ways to modulate the activities of transcription factors. Which of these three...
Study smarter with the SolutionInn App