not disapear after a few hours‚ this may be a pressure sore and should not be ignored. If you think you have found pressure sores‚ contact your GP surgery as soon as possible and seek advice. As people age their skin becomes fragile. Quite moderate friction on the skin can over time cause pressure sores. When helping the person to move be careful not to drag them across the bed or chair. Also make sure there are no rough seams in their clothes or anything in their pockets that could rub. Check their
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same time 7. What forces were acting on the objects dropped in the air? What force was acting on the objects dropped in the vacuum? The force that was acting on the objects that dropped in the air was friction. The force that was acting on the object when it dropped in the vacuum was friction also Part two: Comparing Forces 1. Choose two forces and compare and contrast these forces. You must provide two ways that they are
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interface with a motion sensor elastic threads (unstretched length about 20 cm) × 4 friction-compensated runway trolley 0.5 kg weights / additional trolleys × 3 electronic balance (optional if the mass of the trolley is known) Part A—Net force and acceleration Procedures: 1. Prepare a set-up to record the motion of a trolley on a runway as shown below. While necessary‚ adjust the runway for friction compensation. 2. Start data-logging. Use 1 elastic thread to pull the trolley along
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PHYSICS 1 FAP0015 Questions & Answers to Physics I Assignments Chapter 1 11. What‚ roughly‚ is the percent uncertainty in the volume of a spherical beach ball whose radius is r = 2.86 ± 0.09 m? Answer: To find the approximate uncertainty in the volume‚ calculate the volume for the specified radius‚ the minimum radius‚ and the maximum radius. Subtract the extreme volumes. The uncertainty in the volume is then half this variation in volume. 3 Vspecified = 4 π rspecified = 4 π ( 2.86 m ) = 9
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pushing a box with a force of 10 N over a distance of 4.0 m in the direction of the force? (A) 0.4 J (B) 4.0 J (C) 40 J (D) 400 J (E) 4000 J 2. A person pushes a 10 kg box at a constant velocity over a distance of 4 m. The coefficient of kinetic friction between the box and the floor is 0.3. How much work does the person do in pushing the box? (A) 12 J (B) 40 J (C) 75 J (D) 120 J (E) 400 J 3. How much work does the force of gravity do in pulling a 10 kg box down a 30º inclined plane of length 8
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EFFECT OF SURFACE AREA ON AIR FRICTION Design Background Information: Air resistance‚ also called drag‚ is the forces that are in opposition to the relative motion of an object through the air. Drag forces act opposite to the oncoming flow velocity. Size and shape are the two factors that affect air resistance. Air resistance depends on the surface area‚ so‚ as the surface area increases‚ the air resistance increases. When an object is falling‚ air resistance acts to push it back up. This is
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blah i just want to be able to read this essay so I’m sorry if this isdissappointing to you hold on Physics Pre-AP Projectile Motion Lab Report Purpose The purpose of this lab was to determine how angle and gravity affects velocity and range. Procedure Materials Projectile launcher Marble Two measuring sticks Tin foil Pencil Procedure Set the angle of the projectile launcher to 30 degrees (make sure that the bottom of the launcher is even with the desk). Put the marble inside the
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Disk With Weight: A 15 kg uniform disk of radius R = 0.25 m has a string wrapped around it‚ and a m = 3 kg weight is hanging on the string. The system of the weight and disk is released from rest. a) When the 3 kg weight is moving with a speed of 2.2 m/s‚ what is the kinetic energy of the entire system? KETOT = KEwheel+KEweight = (1/2)(I)(w2)+(1/2)(m*v2) =(0.5* v2)(m+1/2M) =0.5*(2.2^2)*(3+(.5*15)) J b) If the system started from rest‚
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the force of gravity (acts in a downward direction)‚ the normal force (the support force exerted upon the object that is in contact with another stable object)‚ the force of movement (the force from the wheels-moment of an object) and the force of friction (the force exerted by a surface as an object moves across). According to Isaac Newton’s law of Universal Gravitation‚ objects near the surface of the earth accelerate at a rate of 9.8m/s/s towards the ground. The purpose of this investigation
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to ride on. This is familiar to people who play air hockey‚ and it’s been used in lower speed transit before‚ such as the people mover in the Detroit Airport. The low pressure in the tube means that it doesn’t take a lot of power to overcome air friction and can be sustained by on board batteries (using numbers gleaned from their work with the Tesla S)‚ and the big power drain from acceleration is accommodated by Linear Induction Motors (many existing transit designs use LIMs‚ such as the Vancouver
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