m/s/s/)(5s)2 = 100m – 50m = 50 m 5. A car whose initial speed is 30 m/s slows uniformly to 10 m/s in 5 seconds. a) Determine the acceleration of the car. v = vi+at = 10m/s = 30 m/s + a(5s) => 10-30 = 5a => = (-10m/s)/(5s) = -4 m/s/s 6. A dog runs down his driveway with an initial speed of 5 m/s for 8 s‚ then uniformly increases his speed to 10 m/s in 5 s. a) What was his acceleration during the 2nd part of the motion? b) How long is the driveway? v = vi+at = 10m/s = 5 m/s + a(5s)
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SUMMATIVE ASSESSMENT –I (2011) Lakdfyr ijh{kk&I SCIENCE / foKku Class – IX / & IX Time allowed: 3 hours fu/kkZfjr le; % 3 ?k.Vs 470011 Maximum Marks: 90 vf/kdre vad % 90 General Instructions: (i) The question paper comprises of two sections‚ A and B. You are to attempt both the sections. (ii) All questions are compulsory. (iii) There is no overall choice. However‚ internal choice has been provided in all the five questions of five marks category. Only one option in such
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assigned work area‚ or desired production for the day‚ verbal communication would work fine‚ but if vast amounts‚ or important information needs to be communicated‚ written communication would be the best choice. It is best because it can be delivered uniformly and easily referenced back to. Communications used from middle management to upper management‚ or corporate headquarters is going to be dominated by the
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Biography - Aryabhata‚ the Indian mathematician MTH/110 December 10‚ 2012 Biography - Aryabhata‚ the Indian mathematician Aryabhata (476 CE – 550 CE) was the first Hindu mathematician and astronomers from India. He wrote couple of treatise about mathematics and astronomy. Some of them were lost. His most famous works Aryabhatiya completed in 499 CE and the Arya-Siddhanta. Aryabhatiya consists of 108 verses‚ in which Aryabhata wrote about the mathematics and astronomy at the age of 23
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it was a significant change. The next reasonable argument is how is the motion of the Earth not felt its inhabitants? Without knowledge of‚ or disregard for‚ Newton’s laws of gravity it would be astounding how we do not feel the motion of the Earth spinning and traveling though the universe.
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frictionless motion. A known mass is attached to an air-cart on an air-track apparatus. Attached by string‚ the air-cart is pulled by the known mass when hung over a pulley. A spark timer will mark the motion at a frequency of 10 Hz (10 dots/s) on a strip of paper called ticker tape. The air-track will supply air through the apparatus to simulate a frictionless environment‚ enabling the system of masses to move without an applied force or a frictional force. This experiment will measure the motion of an
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force acting on it A is proportional to the displacement from a fixed point. B is proportional to the velocity. C is zero. D is constant but not zero. E increases uniformly with respect to time. 2. Two blocks‚ X and Y‚ of masses m and 2m respectively‚ are accelerated along a smooth horizontal surface by a force F applied to the block X‚ as shown in the diagram. [pic] What is the magnitude of the force exerted by block Y on block X during this acceleration
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× 10 –27 kg R = 8.31 J K –1 mol –1 NA = 6.02 × 10 23 mol –1 k = 1.38 × 10 –23 J K –1 G = 6.67 × 10 –11 N m 2 kg –2 g = 9.81 m s –2 © UCLES 2006 9702/02/O/N/06 3 Formulae uniformly accelerated motion‚ s = ut + at 2 v 2 = u 2 + 2as W =p V work done on/by a gas‚ gravitational potential‚ simple harmonic motion‚ velocity of particle in s.h.m.‚ φ = – Gm r a =–
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Uniform Circular Motion Uniform Circulated Motion is defined as a movement of an object along the circumference of a circle or rotation along a circular path. It can be uniform‚ with constant angular rate of rotation (and constant speed)‚ or non-uniform with a changing rate of rotation. The rotation around a fixed axis of a three-dimensional body involves circular motion of its parts. The equations of motion describe the movement of the center of mass of a body. Physics‚ particularly Uniform
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will pass over a pulley at the table’s edge so that as the mass falls the cart will be accelerated over the table’s force. The cart will be released from rest and allowed to accelerate over a distance. Using a stopwatch‚ we determine how long it takes‚ for the cart to move through the distance. The results that our group gathered seem not accurate because of human error. Introduction: Newton ’s second law of motion pertains to the behavior of objects for which all existing forces are not balanced.
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