A student holds a ball 1.55 meters above the ground and drops it. Her friend uses a stopwatch and measures a time of 0.57 seconds for the ball to hit the ground. Since the value for g obtained from the data is inaccurate, one of the measurements must have been incorrect. Assuming the time was exactly accurate, from what height was the ball actually dropped?

For the following data. Time (s) Distance (m) 1 22 2 43 3 64 4 87 5 101 6 129   Plot this equation: (d = v t), where v is velocity. Determine the slope of the graph. What the physical quantity does the slope represent? Determine the y-intercept of the graph.

You are observing the poles along the side of the road. You have already stopped and measured the distance between adjacent poles as 33.1 m. You are now driving again and have activated your smartphone stopwatch. You start the stopwatch at t = 0 as you pass pole #1. At pole #2, the stopwatch reads 11.8 s. At pole #3, the stopwatch reads 30.7 s. Your friend tells you that he was pressing the brake and slowing down the car uniformly during the entire time interval from pole #1 to pole #3. (Assume you are driving in the positive direction when t = 0.) (a) What was the acceleration (in m/s²) of the car between poles #1 and #3? (Indicate the direction with the sign of your answer.) m/s² (b) What was the velocity (in m/s) of the car at pole #1? (Indicate the direction with the sign of your answer.) m/s (c) If the motion of the car continues as described, what is the number of the last pole passed before the car comes to rest? O pole #1 pole #2 pole #3 pole #4 O pole #5

An insect takes 8.03 minutes to walk 19.9 m toward the south along a deserted highway. A driver stops and picks up the insect. The driver takes the insect to a town 1.62 km to the north with an average speed of 15.6 m/s. What is the magnitude of the average velocity of the insect for its entire journey? Express your answer to 3 significant figures in meters/second.