A manual of physics, theoretical and practical : for medical students / by Hugh C. H. Candy.
- Candy, Hugh Charles Herbert, 1859-1935
- Date:
- 1918
Licence: In copyright
Credit: A manual of physics, theoretical and practical : for medical students / by Hugh C. H. Candy. Source: Wellcome Collection.
31/470 (page 17)
![This is not quite the case until a coincides with c and the angle a o c is zero, but it is nearly true as long as d is a very small angle, as the values in Table V (p. 432) show. It will be convenient to notice here that when a moves round to d (Fig. 3), the angle aob becomes 90° and at the same time ae becomes do, so that then A B DO ^ O A ~ O A ~ ' .-. sin 90° = 1 It is evident also that the sine of a i angle can never be greater than unity. Exercises ]. What is the average velocity possessed by a body falling from rest, (a) during the third second of the fall, (b) during the first three seconds of the fall ? Through what distance will it fall in each period ? 2. In a system of units in whicli the unit of length is a yard and the unit of time is a minute, state in words (a) the unit of velocity, (h) the unit of acceleration. Express the numerical values of these units in terms of the British foot- socond units. 3. A bullet passes in succession through three screens at distances of 1,000 ft. apart. It is found by an electrical method that the time taken by the bullet to pass from the first screen to the second is 0-8 sec., and from the second to the third is 0-86 sec. Assuming that the motion of the bullet is uniformly retarded, find the value of the acceleration. [First 31.B.] (For Answers, see p. 388.)](https://iiif.wellcomecollection.org/image/b29927973_0031.jp2/full/800%2C/0/default.jpg)
