is 1.5 meters long‚ find the average speed of the ball. 5. * A stone tied on a rope has a frequency of 27 rpm. Find the average speed of the stone if the rope is 12 meters long. Centripetal Acceleration (ac) – the rate of change of tangential velocity; standard unit is meters per square second (m/s2); ac = v2/r = vω Sample Problem: 5. A metal ball is attached to a 1-m long string and is whirled to make 3 revolutions per second with the other end as the center. How much acceleration will the
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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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TROLLEY ON RAILS Based on document MGS/ID137/203 by Dr MG Sainsbury Modified in Feb 2007 & Jan 2008 by Dr L Huang and Mr WS Sze 1. Objectives (1) To measure the velocity and acceleration of a trolley as it descends on inclined track and is stopped by a nonlinear elastic arrester system. (2) To compare the measured acceleration‚ velocity and displacement with theoretical predictions of various methods and discuss the physics learned. 2. Apparatus The test setup comprises a short inclined railway
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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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average velocity on this trip? Answer: 27 km/h 4. A bullet is fired through a board‚ 14.0 cm thick‚ with its line of motion perpendicular to the face of the board. If it enters with a speed of 450 m/s and emerges with a speed of 220 m/s‚ what is the bullet’s acceleration as it passes through the board? Answer: –550 km/s2 5. A particle confined to motion along the x axis moves with constant acceleration from x = 2.0 m to x = 8.0 m during a 2.5s time interval. The velocity of the particle
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straightforward mathematical relationships. These mathematical relationships are a recurring concept in the fields of Kinematics and Dynamics which focuses on ways in which objects/matter move whilst evaluating behaviours like displacement‚ acceleration and velocity (Wise Geek‚ 03-13). Kinematics derives its name from the Greek word for “motion” (kinema) (Sparknotes‚ 2011). This field is centred under a sub branch of mechanics which deals with pure motion‚ without reference/implication to the forces and masses
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GRAVITATION Kepler’s Laws Towards the end of the sixteenth century‚ Tycho Brahe collected a huge amount of data giving precise measurements of the position of planets. Johannes Kepler‚ after a detailed analysis of the measurements announced three laws in 1619. 1. The orbit of each planet is an ellipse which has the Sun at one of its foci. 2. Each planet moves in such a way that the (imaginary) line joining it to the Sun sweeps out equal areas in equal times. 3. The squares of the periods
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A projectile is any object that is given an initial velocity and follows a path determined by the effects of gravitational acceleration and air resistance. Projectile motion is the act of projecting an object into the air at an angle when a curved path is an object follows when thrown or propelled near the surface of the earth.For example: a thrown football‚ an object dropped from an airplane‚ or a bullet shot from a gun.Projectile motion may only be used to solve mechanics problems
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biggest one. This real case now can be simplified as 1-dimensional motion in the experiments. During the lab‚ the Motion Lab&VideoRECOREDER was used to record the motion of the cart. After that‚ the accelerations were gained by calculating the slope of Velocity VS. Time graph. The accelerations and the relationship among them in every stage are gained from the graph. Prediction It was predicted that the acceleration would be a constant‚ as long as the angle‚ θ‚ between the track and the desk did not
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a north–south direction across a desert. At 06:00 each crew sets out from their base camp which is situated at the origin (0‚ 0). One crew is in a Toyundai vehicle and the other in a Chryssault vehicle. The Toyundai has velocity vector km h–1‚ and the Chryssault has velocity vector km h–1. (a) Find the speed of each vehicle. (2) (b) (i) Find the position vectors of each vehicle at 06:30. (2) (ii) Hence‚ or otherwise‚ find the distance between the vehicles at 06:30. (3) (c) At this
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