Answer Happy

Set Part II: Angle Launched Projectile Speed = 60 m/s Angle = 60 degrees Height = 0 m Select "Show Velocity Vectors" and "Trace Path" Directions and Questions: 1. Horizontal and Vertical Velocity Click the Start button and observe the simulation. The red arrows are velocity vectors. They are indicators of how fast the object is moving horizontally and vertically. The length of the arrow indicates how fast the object is moving in that direction. Describe the horizontal and the vertical velocity: The horizontal velocity (vx) is vertical velocity (vy) is Keset x-displacement: 0 m Trace Path Show Velocity Voctora Show Acceleration Vector 0.00 s y-displacement: 0m S 60 m/s : Speed 60 deg: Angle 0 m: Height (constant, changing) and the (constant, changing). 2. Vertical Velocity at Peak Carefully observe the vertical velocity vector as the projectile approaches the highest point (i.e., the peak). At its highest point, the vertical velocity is a. zero b. large and downward c. large and upward d. the same size as at t=0.0 s 3. Time to Rise and Time to Fall As the simulation runs, the time is displayed at the top of the Interactive. If the Pause button is pressed, arrows appear next to the time to step the simulation forward or backward. Use these controls to measure the time it takes to rise to the peak, the total time in the air, and the time it takes to fall from the peak. Record to the first decimal place. ttotal = trising = S tfalling= Analyze these measurements and make a generalized statement about trising and tfalling. S
4. 5. Anna Litical makes the following claim: The vertical velocity (vy) 1.0 second before reaching the peak is the same size as the vertical velocity (vy) 1.0 second after reaching the peak. The same is true of the vy values 2.0 seconds before and after the peak. Do you agree or disagree with Anna's claim? support your answer the evidence and reasoning. Size and Direction of the Acceleration Enable the Show Acceleration Vector option and run the simulation several times in order to answer the following three statements: The acceleration of a projectile is a. constant b. changing Circle all that apply. c. decreasing as it rise d. increasing as it falls The direction of a projectile's acceleration is always a. in the direction that it is moving b. opposite the direction it is moving c. downward When at its highest point, the acceleration is a. zero b. large and downward c. large and upward Perform some trials and 6. Angle for Maximum Range Vary the launch angle, make measurements and answer the following two questions. What launch angle results in the greatest range? State a rule that describes what pair of launch angles could be expected to result in the same x- displacement or range. d. the same size as at t=0.0 s Angle (0) 15 25 35 40 45 50 55 65 75 x-displacement (m)