Without friction the world would be very different! It would be so strange in a bad and good way..... For a start‚ walking would be different because when you put your weight on the foot behind you there would be nothing to stop it sliding. You would fall over and not be able to walk. It would be very hard to get around. You could consider blowing yourself around but it still wouldn’t work. Taking in a breath‚ you would slide forward and then blowing out‚ you would slide backward! Having no friction
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Measuring the Density of Ball Bearings/ Density Aaysha Dawood Chem 1211L-198 September 7‚ 2012 Procedure: The procedure for this lab was taken from the lab manual below: Block/McKelvy (2012). Laboratory Experiments for Chem 1211L & 1212L Cengage Learning (7th ed.)‚ p. 5-19 (Measuring the Density of Ball Bearings/Density). No changes occurred that were different from the procedure listed above. Data: Measuring the Density if Ball Bearings | Ball 1 | Ball 2 | Ball 3 | Ball 4 |
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x 2.0 = 3000 cos 30˚ x 8.0 F = 24 000 ÷ 2.0 F = 12 000 N b) ∑Fy = 0 (the sum of the forces up must equal the sum of the forces downward) V + 3000 = 12000 V = 9000 N down 2. A crate is 8.0 m tall and 3.0 m wide. Its coefficient of friction to the floor is 0.70. What is the maximum distance from the floor a horizontal force may be used to slide the crate without tipping it? ∑T = 0 ∑Fx = 0 F x d = mg(1.5) F = Ffr F
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Investigation of the factors affecting the period of vibration of a weighted cantilever Introduction The aim of the experiment is to find out how the period T of vibration of a weighted cantilever depends on the vibrating length L. Hypothesis: Assume the relationship between the vibrating period T and vibrating length L is in accord with the equation: T=kLn‚ where k and n are both constant values. According to the hypothesis‚ the vibrating period T and vibrating length L is a linear relationship
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University of Waterloo Department of Physics & Astronomy Physics 121 – Midterm Fall 2010 Instructors: Dr. Robert Mann (sections 2‚3) Dr. Guenter Scholz (section 1) Date: November 4 ‚ 2009 Time: 19:00-21:00 Duration: 2 hours (120 minutes) rh Instructions Important: Write your name and student ID on each page. If necessary you may use the back of the page to continue your answer but not the back of the previous page. The pages may be separated as part of the marking process. 5 questions
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MCV4U0 Vector Applications Name:__________________ Date:______________ 1. A ship sailing on the open sea leaves Port A for Port B at a bearing of N25oW. A wind of 6 km/h on a bearing of N10oE blows the ship off course. If the ship is capable of 35 km/h in still water‚ find the new speed and direction relative to the shore. 2. A boat is capable of 20 km/h in still water. You wish to cross the river to a point directly across from your present position. At what angle to the bank should
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The trebuchet is made of five basic parts. The base‚ counterweight‚ throwing arm‚ sling‚ and pivot. The base gives the trebuchet a secure base to help with over rotation and other engineering problems that may occur. The counterweight falls and the force of gravity thrusts the projectile forwards. The throwing arm is used to connect the counterweight and sling‚ and is part of the thrust downwards.The sling holds the projectile and the pivot is there to prevent over-rotation. Trebuchets can be made
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Vidyamandir Classes ANSWERS - JEE MAINS Test - 1/IITJEE-2014 CHEMISTRY 1 D 11 D 21 C 2 D 12 C 22 B 3 D 13 B 23 D 4 C 14 C 24 B 5 C 15 B 25 B 6 B 16 C 26 B 7 A 17 C 27 B 8 B 18 D 28 A 9 D 19 D 29 B 10 A 20 C 30 D PHYSICS 31 C 32 C 33 A 34 B 35 CANCEL 36 A 37 C 38 B 39 C 40 C 41 A 42 C 43 D 44 C 45 C 46 C 47 C 48 C 49 C 50 D 51 A 52 D 53 C 54 A 55 C 56 B 57 B 58 D 59 D 60 B
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the science lab. In science‚ we would participate in a lab. One of my favorite labs was the owl pellet dissection. Owl pellets are owl throw up. In owl pellets you can find the bones of animals the owl consumed. In this lab we were to take out the bones we found in the pellet and construct the animal we found inside. Most people‚ like me‚ had a sort of rodent‚ but some people found birds in their pellet. Another one of my favorite things we did in science was the Sharpie tie dye lab in fifth grade
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radiation of heat from the ground into the air B. of low atmospheric pressure C. of the compact density of air D. more dust particles gather in the air A moving body on earth ordinarily comes to rest by itself because of the A. law of inertia B. force of friction C. conservation of momentum D. gravity An isotherm is a line joining places having equal A. Humidity B. Air pressure C. Temperature D. Rainfall Railway tracks are banked on curves so that A. necessary centrifugal force may be obtained from the horizontal
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