After 2 s‚ a second ball is thrown straight downwards. What should be the initial velocity of the second ball so that both hit the water simultaneously ? 1) 2.45 ms-1 2) 49 ms-1 3) 14.5 ms-1 4) 24.5 ms-1 3. Which of the following are true ? 1. A body having constant speed can have varying velocity. 2. Position time graphs for two objects with zero relative velocity are parallel. 3. The numerical ratio of velocity to speed of an object can never be more than one. 1) 1 only 2) 2 and 3 3) All 4) None
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| 4.0 | Average Velocity m/s | 0 | 1.75 | 3.1 | 4.3 | 7.05 | 8 | Acceleration m/s/s | | | 6.75 | 12.75 | 13.75 | 4.75 | MOON Time (s) | 0 | 0.4 | 0.8 | 1.2 | 1.6 | 2.0 | Distance (m) | 0 | 0.34 | 1.0 | 1.27 | 1.64 | 2.6 | Average Velocity m/s | 0 | 0.85 | 1.65 | 0.68 | 0.93 | 2.4 | Acceleration m/s/s | | | 2.0 | -2.4 | 0.63 | 3.68 | MARS Time (s) | 0 | 0.3 | 0.6 | 0.9 | 1.2 | 1.5 | Distance (m) | 0 | 0.51 | 1.02 | 1.34 | 2.07 | 2.68 | Average Velocity m/s | 0 | 1.7 | 1
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When an object (stone‚ spear‚ arrow or bullet) is thrown‚ hurled or shot in the air‚ the object is a PROJECTILE (“Projectile”). The study of projectile is important because it must be realized that they are very much part of man’s daily life then and now. Whether man likes it or not‚ he encounters and uses projectile in his everyday life. Our hunting ancestors threw stones and spears on animals to kill them for their food. In today’s sports‚ balls follow projectile motion such
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the distance from the edge of the table to the end of the ramp. • Roll the ball down the ramp and off the table but make sure to catch the ball as soon as it leaves the table; do this part 10 times and record the times • Calculate average velocity for this step • Measure the height (vertical distance or the y-axis) of the table. • Using this height‚ derive t (time) from the uniform accelerated motion in order to obtain the predicted distance x. • The next step is to release
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Reading Assignment #1: Vector Analysis Textbook Sections that I read: 2.1-3 Important Concepts: An interaction between two objects can be described and measured in terms of two forces. The force is a push or either a pull. There are two types of forces. #1 is a long range force and this force does not require the objects involved to be touching each other. An example of this is when you are holding a magnet away from a refrigerator and you are able to feel the magnetic pull. #2 is a contact force
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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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popular seems to be the stair climber machine. If a stair climber machine is going to be designed the information needed to be collected would vary widely. One would need to compute its angle of incline. Other things needed are the maximum and minimum velocities‚ the distance‚ vertical height of the machine‚ and a stopwatch to count the amount of time a person uses it. To calculate the weight of a person in Newtons a scale would be used. The reason the angle of incline of the machine is so important is
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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 edge of a cliff
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each of these situations? Remember that if an object speeds up‚ then the velocity and acceleration vectors are in the same direction. If an object slows down‚ then they are in opposite directions. Any object that is traveling in a vertical direction also experiences acceleration due to gravity. Left: Object travels to left and speeds up. Down: Object is tossed upward. A ball is tossed up into the air with a velocity of 50 m/s. The figure to the left shows the position of the ball at equal
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Diameter 1 2 3 4 5 6 Average Time (s) Velocity m/sec 2mm 1.62 1.54 1.60 1.63 1.55 1.78 1.62 0.155 3mm 1.10 1.15 1.11 1.19 1.20 0.97 1.12 0.225 4mm 0.89 0.86 0.84 0.82 0.81 0.88 0.85 0.296 Six trials were conducted to measure the time for the ball to reach to the bottom of the container. The following is a sample calculation done for 2 mm diameter. The Average time for (2mm) ball =(1.62+1.54+1.60+1.63+1.55+1.78)/6=1.62 sec Terminal Velocity = Distance/(Time (avarge) ) = (0.252
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