includes the air resistance and different kinds of errors caused by students’ carelessness is different from the theory‚it is unaviodable that the results are quite different from the theoretic statistics. The horizontal velocity is related to the range‚ while the vertical velocity is related to the maximum altitude. This experiment can help us reinforce the concepts related to the motion in two dimensions although the water rocket does not have the ideal situation. A lot of equations we learned in
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thrust. When an object starts to fall‚ gravity over powers air resistance‚ however‚ as an object starts to reach terminal velocity (its maximum speed) the opposite forces start to even out until they are equal. Some people believe that if the forces are balanced then the object has stopped moving‚ meanwhile they could also just be moving at a constant speed (its terminal velocity). All free-falling objects accelerate at the same speed no matter what their mass is (9.8m/s²). There are two calculations
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quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity. Sports announcers will occasionally say that a person is accelerating if he/she is moving fast. Yet acceleration has nothing to do with going fast. A person can be moving very fast and still not be accelerating. Acceleration has to do with changing how fast an object is moving. If an object is not changing its velocity‚ then the object is not accelerating. The data at the right
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Objective: In this lab we will compare different parameters of a launched projectile. This includes time of flight‚ initial velocity‚ initial vertical velocity‚ initial horizontal velocity‚ range‚ time of max height. All these data points are collected for 30°‚ 40°‚ 45°‚ 50°‚ 60°‚ 70°. Date for the 0° angle is was only initial velocity‚ and time of flight. We will then study the relationship of these data points as a function of launch angle.
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Multiple Choice Question 6.31 A 1000-kg car moving at 10 m/s brakes to a stop in 5 s. The average braking force is 3000 N 5000 N 2000 N ***(answer) 1000 N 4000 N Force = mass x acceleration. Acceleration = velocity/time = -10/5 = -2 m/s/s. (- sign means a deceleration from velocity of 10 to 0) Force = 1000 x -2 = -2000 Newtons (i.e. 2000N in opposite direction to motion) Multiple Choice Question 6.11 When you jump from an elevated position you usually bend your knees upon reaching the
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Nonlinear Control and Analytical Mechanics A Computational Approach‚ Birkhauser‚ Boston‚ 2000. [25] K. Kozlowski‚ P. Herman‚ Control of robot manipulators in terms of quasi-velocities‚ Journal of Intelligent and Robotic Systems 53 (3) (2008). [26] P. Herman‚ K. Kozlowski‚ A survey of equations of motion in terms of inertial quasi-velocities for serial manipulators‚ Archive of Applied Mechanics 76 (9-10) (2006). [27] V. Duindam‚ S. Stramigioli‚ Lagrangian dynamics of open multibody systems with generalized
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Q.1 Q.8 (a) (a) Name three Muslim scientists? (3) Fill in the blanks:(1) (viii) The dimension of any physical quantity can always be expressed as some combination of the fundamental quantities. 1995 Q.1 (c) What are the dimensions of angular velocity “ω”? Show that the equation √ is (3) (1) dimensionally correct‚ where “T” is the time period of a simple pendulum of length “ ” at the place where acceleration due to gravity is “g”. Fill in the blanks:(v) Candela is the unit of intensity of light
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Chapter 4 Problems 1‚ 2‚ 3 = straightforward‚ intermediate‚ challenging Section 4.1 The Position‚ Velocity‚ and Acceleration Vectors 1. A motorist drives south at 20.0 m/s for 3.00 min‚ then turns west and travels at 25.0 m/s for 2.00 min‚ and finally travels northwest at 30.0 m/s for 1.00 min. For this 6.00-min trip‚ find (a) the total vector displacement‚ (b) the average speed‚ and (c) the average velocity. Let the positive x axis point east. 2. A golf ball is hit off a tee at the
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Activity Lab #4 : Non-Uniform motion Design Aspect 1 * Problem: What is the acceleration of the puck in the air table? Aspect 3 Material List: * Strip of Paper * Puck * Foot pedal * Air table * Procedure: 1) Place a long sheet of white unlined paper‚ and place it on the air table. 2) Turn on the air table machine. 3) Place the puck top of the air table over the long sheet of white unlined paper 4) Using your foot‚ press down on the foot pedal. 5) Release the
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in velocity as time goes by Change in velocity as time goes by Review Acceleration: Magnitude or direction (not units) Direction only Magnitude or direction (not units) Direction only Acceleration means _______________________________________________ What CAN change for a velocity vector? _____________________________________ What IS changing when something moves in a circle? ____________________________ an object in motion continues in constant-velocity motion
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