Drive Right Companion - Delsea

NameDatedouble: To double is to multiply by two. To double the number 9, multiply by2; that is 9 X 2 = 18. A box weighs 9 pounds. Double the weight of the-box is 18 pounds. If you are driving 20 miles an hour, double your speed is40 miles an hour.twice: Twice is two times. You called your friend twice yesterday if you called her onetime in the morning and one time in the evening. Twice can also mean to multiplyby 2. The box weighs 9 pounds. Twice the weight of the box is 18 pounds.triple: To triple is to multiple by 3. To triple the number 9, multiply by 3; that is,9 X 3 = 27. A box weighs 9 pounds. Triple the weight of the box is 27 pounds. Ifyou are driving 20 miles an hour, triple your speed is 60 miles per hour.square of a number: The square of a number is the number you get when youmultiply a number by itself. The square of 2 is 4; that is 2' = 2 X 2 = 4. Thesquare of 3 is 9; that is 32 = 3 X 3 = 9.Think About It: Energy of MotionLook at the pictures below, then circle the correct answer for each question.Car A is going 35 miles per hour.Car B is going 40 miles per hour.1. Which car has more energy of motion?a. car A b. car B2. Which car will need more time and distance to stop?a. cat A b. car B3. Which car is obeying the speed limit?a. car A b. car B36 Chapter 5 Natural Laws and Car Control Unit 2 Controlling Your Vehicle