CBSE TEST PAPER-02 CLASS - IX Science (Motion) 1. If a body starts from rest‚ what can be said about the acceleration of body? (a) Positively accelerated (c) Uniform accelerated (b) Negative accelerated (d) None of the above [1] 2. What does slope of position time graph give? (a) speed (b) acceleration (c) uniform speed [1] (d) Both (a) and (c) depending upon the type of graph. 3. When a body moves uniformly along the circle‚ then:(a) its velocity changes but speed remains the same (b) its
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determine the minimum speed required to clear 8m in 2.02 s just use D/T= 8/2.02= 3.96 m/s horizontally to clear 8 m from 20 m vertically. 5) Using acceleration = force * mass‚ we know the car had a force of 5000N‚ and a mass of 1500kg. 5000/1500 = -3.33 m/s deceleration. It took 5.6 seconds for the car to decelerate to 0‚ so multiply the deceleration/acceleration with the amount of time to obtain the initial speed of the vehicle. 3.33 * 5.6 = Initial speed of 18.65 m/s 6) Weight is equated as mass * gravity
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Instructor: (Name) Introduction We verified Newton’s Second Law for one-dimensional motion by timing an accelerated glider moving along a flat track. We varied both the accelerating force and the mass of the glider. We found that for a given force the acceleration of the glider was inversely proportional to the mass of the glider‚ in agreement with Newton’s Second Law. Experimental Procedure Description of the Apparatus: A sketch showing the essential elements of the apparatus is presented in Figure 1. below:
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Name Class Date Concept-Development Practice Page 4-1 Free Fall Speed 1. Aunt Minnie gives you $10 per second for 4 seconds. How much money do you have after 4 seconds? $40 2. A ball dropped from rest picks up speed at 10 m per second. After it falls for 4 seconds‚ how fast is it going? 40 m/s 3. You have $20‚ and Uncle Harry gives you $10 each second for 3 seconds. How much money do you have after 3 seconds? $50 4. A ball is thrown straight down with an initial speed of 20 m/s. After
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motion in a straight line. 1. Distance travelled as a function of time 2. Velocity as a function of time 3. Acceleration as a function of the accelerated mass 4. Accelerated as a function of force THEORY Newton’s equation of motion for a mass point of mass m to which a force RF is applied is given by the following: m · Ra = RF ‚ where Ra = is the acceleration. The velocity v obtained by application of a constant force is given as a function of the time t by the expression
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1 Velocity‚ Speed‚ Acceleration‚ and Deceleration The goal for today is to better understand what we mean by terms such as velocity‚ speed‚ acceleration‚ and deceleration. Let’s start with an example‚ namely the motion of a ball thrown upward and then acted upon by gravity. A major source of confusion in problems of this sort has to do with blurring the distinction between speed and velocity. The speed s is‚ by definition‚ the magnitude of the velocity vector: s := |v|. Note the contrast: –
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the acceleration of a cart that rolling down from a frictionless track (our assumption) by calculating theoretically and measuring experimentally. Compare the experimental and expected values of acceleration. Show that the acceleration of a cart moving down a slope (from frictionless track) is dependent on the angle of the slope. Introduction If you have been on a roller coaster‚ you experienced a large‚ downhill acceleration after reaching the top of the first hill. Compare this acceleration to
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trolley and the weights (ca. 2m) -‐1 set of weights that will accelerate the trolley (up to 5N) -‐1 a.m. to measure the acceleration Smart ^ (including all pieces) D.1 Aim of Experiment: ^Trolley The aim of this experiment is to test Sir Isaac Newton’s second
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Chapter 4 – Linear Motion Reading Assignment Section 4.1 –Motion Is Relative 1. How can you describe motion? 2. Describe motion in terms of space shuttle? What is it relative to? A race car? 3. How can you be both at rest and also moving about 107‚000 km/h at the same time? 4. When you describe the speed of anything what are you actually describing? 5. How can you tell that an object is moving? 6. You cover 10 meters in 1 second. Is your speed the same if you cover 20 meters in 2 seconds? Section
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