- 3. (a) [3]moving object has elevation tion as a function of time given by h(t)=a+bt-ct^2 __ where a, b and care constants. What is the dimension of each constant? [a]= [b]= [e]= (b) [5] In the equation above, the values of the constants in FPS units are a=15,b=30 and c=18 Determine the values of hand tin FPS units, at the instant when the object reaches its maximum elevation.
- Analysis: (16 points) In the box below,write a paragraph that explains what you did in your experiment, which way gave you the best shot and why you think this happened. Make sure to include answers to the following questions: 1. Explain how you discovered the best way to make the perfect shot? 2. Is it better to throw the ball from chest level or waist level? Explain. 3. Did you prefer getting a running start to make the shot or was it easier to make a shot standing in front of the hoop? Why? 4. Explain how the distance away from the hoop matters in determining the best type of shot. square
- 1. New Inventions and Technologies o Think about the technology you use every day (like phones, computers, or machines at school). Question: Why do you think new inventions and machines might help people make more things faster?
- The air temperature is 25^circ C and an air column carries a standing sound wave at a frequency of 340 Hz . What is the length of the air column, which is closed at one end if you want to hear the third harmonic?K/U
- 2. The speed of a wave travelling along a 0.65 m guitar string is 206m/s At n=6 the frequency is 950 Hz. (a) What is the frequency if a string with a wave speed of 150m/s is used? [ans: 690 Hz] (b) What is the frequency if the string is tightened to make the wave speed 350m/s [ans: 1600 Hz]
