3:02AM Sat Mar 9 eoe ;e 2ag HCHW Ch 2 (31).pdf @) IS SR8 B AN 1.1 a. Put in two words: A train moves with one-dimesional motion. This means along the x-axis below the train can either move or b. Draw the postion and velocity vector for each train above. c. How you draw the size of the velocity vector of each train is unrelated to the size of each position vector. Explain why. Give a short sentence as your answer. ANS: the position vectors have units of distance like meters but the velocity vectors have units of distance over time like meters per second. 2.2. a. A dogis running. If its velocity vector component is v = 0.4% then which picture of the dog is correct if using the standard orientation of the axis (seen below) where postive is to the right. T 1T T T T 71 -3 -2 -1 0 1 2 3 #1 H#2 b. Ifits velocity vector componentis v = 0.4? then which picture is correct if using the non- standard axis seen below where postive is now to the left. 3 2 1 o -1 -2 -3 c. If a physics student says a cat's speed is |[v| = 0.4 % Explainin a short sentence why you don't know if the cat is moving left or right. d. A dog moves with initial position x; = 2m with net displacement Ax = 5m. Draw the initial and final position vectors (arrows) of the dog below. HELP: recall that postion vectors are drawn with their tail at the origin and tip at the location of the object. The dog must have final postion x, = =7m -7 -6 -5 -4 -3 -2-1 0 1 2 3 4 5 6 7 Q Notifications 3:02AM Sat Mar 9 Goo = 80% W) & 2ag HCHW Ch 2 (31).pdf Oy N e. Suppose a dog moved so that its initial postion was x = +1m and the magnitude of its displacement vector was |[Ax| = 5m. Explainin a short setence why you don't know if the dog's final position is - 4m or + 6m. 3.3. a. The dog seen below moves with velocity v = 1.5 % Put a number in the first blank and a word in the second: It's speed is m/s and its direction is . Assume the standard orientation of the axis where postive is the right. b. Suppose also that a cat moves with velocity v = 3.0 % Draw the velocity vector on each animal below and comment on the drawing scale: i.e., how much longer is the cat's velocity vector compared to the dogs? S \"-\\ 3 - 3 = W 4.4, A quick way to see if a variable n represents a vector component or a scalar is to add the phrase \"in the direction east\" and see if that sentence makes sense. Do that to each below and state if the variable represents a scalar or vector a. A force of F = 10 lbs was applied to the brick b. Juan drank V = 2 Liters of Pepsi. 5.C. B > _ feet -10 o 10 20 30 40 S50 The jogger moves from point A to point B. Assume distance units of feet [ft] a. Onan axes with no numbers you will often see a + and/or symbol at the end of the axis like > What purpose does the + sign serve? Explain in a short sentence. HELP: See problem 2.2a,b. b. In the diagram above, what is the jogger's initial position? c. What is the jogger's final position? d. What is his displacement? e. What distance did he move? f. Draw both position vectors and the displacement vector in the picture above. HELP: the displacement vector has its tail at the initial position and tip at the final position. 6.C. a. Some quantities in physics are not just numbers but are considered a geometric arrow (having both a size and direction). These quantities are called Q Notifications 3:02 AM Sat Mar 9 . . . 80%