More Equilibrium Problems 1. A uniform 25 kg bar‚ 6.0 m long‚ is suspended by a cord as shown. What is the tension in the cord? 270 N 2. A boom hinged at P is held stationary‚ as shown in the diagram below. If the tension in the supporting cord‚ attached three-quarters of the way along the boom from P‚ is 720 N‚ what is the weight of the boom? 2160 N 3. A uniform beam 6.0 m long‚ and with a mass of 75 kg‚ is hinged at A. The supporting
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incline in the shape of a quarter of a circle of radius R. The block then slides onto a horizontal plane where it finally comes to rest 8 meters from the beginning of the plane. The curved incline is frictionless‚ but there is an 8newton force of friction on the block while it slides horizontally. Assume g = 10 meters per second2. a. Determine the magnitude of the acceleration of the block while it slides along the horizontal plane. b. What time elapses while the block is sliding horizontally
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leaning in the opposite direction of the applied/unbalanced force. Another physical example can be seen if someone were to push an ice cube across a surface. When pushed‚ an imbalance occurs because the applied force is stronger than the kinetic friction force that is aiding in keeping its inertia. Therefore the ice slides‚ but it does eventually slow down and stop. A third example occurs when someone may try or succeed in pulling a tablecloth from beneath the table settings. When the person pulls
Free Force Friction Classical mechanics
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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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
Free Force Friction
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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Abstract This purpose of this experiment was to observe the relationship between centripetal acceleration‚ centripetal force‚ and a mass M. In this experiment we used a circular motion apparatus that had a plumb bob attached to a metal shaft (that connected the plumb bob to the vertical shaft) and spring. We found the centripetal force from the spring when it was in circular motion. We hung masses off a pulley system that was attached to the plumb bob until the plumb bob was perpendicular to the
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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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