Jessica Yan Rick St. Denis, Tyler Wiseman 13 September 2012 Projectile Motion: Ball in the Bin Purpose: The purpose of the experiment is to determine the velocity of a ball launched from the Projectile Launcher device, and then to use that velocity to find where on the floor the ball will land given a specific angle. Theory: Two-dimensional motion is as it sounds, made of the two components of Vertical velocity and Horizontal Velocity. Horizontal Motion can be described as constant, neglecting air resistance, and Vertical Motion is characterized by the acceleration of gravity pulling at 9.8m/s². In this particular experiment, the total velocity will be split into the two components in order to find the time in the air, and horizontal distance from the launcher. The motion of these components can be described as d=vt for constant horizontal motion, and d=1/2at² + Vit.
For collisions, the momentum before the collision is equal to the momentum after the collision e.g. snooker balls Momentum before collision EQUALS Momentum after collision p=mv p=0 p=0 p=mv Another example is cannon before being fired and after being fired. Before the cannon is fired the momentum is zero, after it is fired the cannon ball moves forward and the cannon moves back. The momentum of the cannon ball is the same as the momentum of the cannon moving backwards. In this sort of example you should choose one direction to be positive and the other direction to be negative.
Force Fields Summary Response In Michio Kaku’s article “Force Fields”, he explains how a force field can deflect laser beams. Throughout out his article Kaku shows that future science might be able to provide the same technology as science fiction TV shows such as Star Trek because he believes that science would overcome issues of limited technology. In order for force field function correctly he suggests that there has to have three layers. The outer layer is high temperature plasma created by supercharged plasma window. The middle layer is a group of laser beams.
5-round shot group to obtain 8 out of 10 rounds—within a 12 inch circle. 1 set of 20 rounds at 300m using 5-round shot groups to obtain 6 out of 10 rounds within 19-inch circle. ENABLING LEARNING OBJECTIVE: Action- Identify procedures for BRM Confirm Zero Range Conditions- Day; KD range with crosswind of 5mph or less; M16 rifle; KD targets at 200m/300m; 2 magazines; 40 rounds 5.56mm, ACU w/soft cap Standards- Demonstrate understanding of engaging targets at known distances Activity 1- Receive BRM Confirm Zero Range Safety Brief Activity 2- Review Marksmanship Fundamentals (Steady Position, Aiming, Breath Control, Trigger Squeeze) Activity 3- Review Peer Coaching (position yourself on the shooters firing side) Activity 4- Understand Confirm Zero Procedures/Course of Fire * Secure 2 magazines with 20 rounds per magazine * Fire four 5-round shot groups (2 from prone supported, 2 from prone unsupported) at
A ball was diameter was taken of the ball (in cm). The projectile launcher had to be leveled by the inclinometer. Afterwards, using the projectile ball, and the ram rod, the projectile had to be shot onto the clip board with the carbon paper attached to it. The geometric center of the trials was taken; this height was the initial height of the projectile. The launcher had to be relocated to an appropriate distance that will let the projectile strike the lower portion of the target.
Answer: -Of the three balls that are rolled, the ball in the middle should reach the bottom first strictly based on the fact that it travels down a steeper slope at the beginning, resulting in a faster acceleration then the other two balls. 22.) Which is greater, an acceleration from 25 km/h to 30 km/h or one from 96 km/h to 100 km/h if both occur during the same time? Answer: -The acceleration from 25 km/h to 30 km/h is 5 km/h. The
Abraham Zapruder captured the entire assassination on his handheld video camera. This film, the Zapruder Film, is the best piece of visual evidence in the case. Donald E. Wilkes Jr. believes that the best way to clearly understand the Zapruder film is to break it into frames. This film ran at eighteen and three-hundredths frames per second, which means that all the shots were actually fired several frames before the number assigned to them. For example, the head shot was called at Z313, but was probably fired at Z310, since it took 2 – 3 frames per second for the bullet to reach its target.
b Which of the 3 punts has the longest hang time? 4 A battleship simultaneously fires two shells at two enemy submarines. The shells are launched with the same initial velocity. If the shells follow the trajectories shown, which submarine gets hit first ? 2 3) both at the same time For a cannon on Earth, the cannonball would follow path 2.
Place your answers in the blanks below. Batman’s velocity: ________________ The Joker’s velocity: __________________ d) Make a rough sketch of (a) position vs time graphs (b) velocity vs time graphs (c) acceleration vs time graph of Batman and Joker. 20) An object has a speed of Vi it accelerates at a for t seconds and ends with a speed of Vf . If it accelerated for 3t seconds find the final velocity in terms of Vi and Vf. 21) One rock is dropped from the top of a cliff of height h at the same time as a second rock is tossed upward at speed v. if the rock that was tossed upward takes twice as much time to reach the ground as the one that was dropped, what was the initial speed, v, of the rock that was thrown (state in terms of g and h)?
Procedure 3: The Compound Pendulum The aim of this experiment is to determine the value of the acceleration due to gravity by measuring the period of oscillation of the pendulum when suspended from different distances from its centre of mass. A pendulum consisting of any swinging rigid body which is free to rotate about a fixed horizontal axis is called a compound pendulum. This experiment had to be carried out at Glasgow University as the required equipment was not available at school. Procedure 1) The pendulum was balanced on a large brass knife edge to determine the position of the centre of mass of the pendulum. 2) The larger moveable knife edge was then clamped to the pendulum, at a small distance (1cm) above the centre of mass.