At the right are drawings of three metal weights hanging from strings attached to a bar. hanging from a bar. string 1 and string 3 are the same length. string 2 is shorter. a 10 unit weight is attached to the end of string 1. a 10 unit weight is also attached to the end of string 2. a 5 unit weight is attached to the end of string 3. the weights can be swung back and forth and the time it takes to make a swing can be timed. metal weights hanging from strings attached to a bar suppose you want to find out whether the length of the string has an effect on the time it takes to swing back and forth. which strings would you use to find out? question 1 options: only one string strings 1 and 2 all three strings strings 2 and 3 strings 1 and 3 question 2 (mandatory) (1 point) the answer to the last question is true because question 2 options: you should make all possible comparisons. the weights differ. only the lengths differ. you must use the longest strings. you must compare strings with both light and heavy weights. question 3 (mandatory) (1 point) the graph shows the progress made by an ant moving in one direction. time vs. distance graph of ant moving in one direction if the ant keeps moving at the same speed, how far will it have traveled at the end of 30 seconds? question 3 options: 5 cm 6 cm 20 cm 30 cm question 4 (mandatory) (1 point) suppose you are moving to the right at 5 m/s. a timer starts the watch when you are 2 m from the starting line. which equation best describes your position as a function of time? position as a function of time graph question 4 options: p = 2t + 5 p = 5t + 2 5t — 2 p = 5t question 5 (mandatory) (1 point) the graph below shows the relationship between the position of an object and the time. position vs. time graph which rule matches the relationship shown on this graph? question 5 options: p = t - 1 p = t + 1 p = 2t p =1/2t question 6 (mandatory) (1 point) the graph below shows the distance traveled before coming to a stop after the brakes applied for a typical car traveling at different speeds. distance vs. car speed graph a car traveling on a street stopped 30 meters after the brakes were applied. about how fast was the car traveling? question 6 options: 10 km per hour 40 km per hour 55 km per hour 68 km per hour question 7 (mandatory) (1 point) what is the best estimate of the area of the figure below? area of figure question 7 options: 28 square units 41 square units 47 square units 54 square units question