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- Suppose that À = 2i + j, B = i– 4j +k, and Ĉ = j+k. ... What is À· (B x Ĉ), A) A. -2 В) в. -2 k (с) с. -11 D) D. -11 k4. Answer the below questions using this graph. V(V) 4 6 40 30 20 10 0 0 2 a. What is Ex at 1m? Answer: b. What is Ex at 4m? c. What is Ex at 7m? -x(m) 81%A9 li. t LTET 4G+ Vol) O A X O U 9:-7 Second H.W.pdf 1. Draw and label the vector with these components. Then determine the magnitude and angle of the vector. a- Az = 3 ,A, = -2 b- B, = -2 ,B, = 2 2. What is the speed of horse in meter per second that runs a distance of 1.2 miles in 2.4 minutes? 3. A car moving along X- axis according on the function: X (t) = 2 t2 + 5t +7 on [1,2] Find: a- The average velocity. b- The acceleration at 3s. 4. Julie is walking around a track at a 2m/s for some exercise. She then decides to start jogging so she accelerates at a rate of 0.5m/s? for 3 seconds. How far did Julie travel from the time she started to accelerate to the end of the 3 seconds? 5. Ralph uses a 2000 to do this. force to push his car along a road for 1000 m. It takes him500 s a- Calculate the amount of work that Ralph did on the car. b- Calculate the amount of power that he generated. II
- 2. A certain fuel-efficient hybrid car gets gasoline mileage of 55.0mpg (miles per gallon). a. If you are driving this car in Europe and want to compare its mileage with that of other European cars, express this mileage in km/L. b. If this car's gas tank holds 45 L, how many tanks of will you use to drive 1500 km?W = F₁Ax = F· Ax, Wnet = m(v₁)² - ² m(v₁)², W = F₂dx, W = F·dr Problem 1: a) A = 31-2j, B = 41-5ĵ. What is A. B? Answer: 22 b) A = -21 +4ĵ, B = 31-1 j. What is A. B? Answer: -10 c) A = -8 1-5j, B = -5 î+8j. What is A. B? Answer: 09. 10 The equation of the graph above is A P-10Q +5 B C P=-2Q+10 D P - 2Q + 10 P 5Q-10
- The table data: 15 1.75 13 1.63 11 1.5 9 1.35 7 1.19 5 1.01 3 0.78 A. Graph these data B. Describe the graph C. Using the data, calculate 1/2t^2 and complete table 2 belowNumber 1 answer should be 144 J. Number 5 answer should be 988 J. You must answer no. 1, 2, 4, 5 and 6 Thank you in advance. I hope you can answer those questions.0.3 Suppose the average daily metabolic rate for certain types of animals can be expressed as a function of mass by r= 120.9m where m is the mass of the animal (in kilograms) and r is the metabolic rate (in kcal per day). " dm dr dt a. If the mass of an animal is changing at a rate of find dt b. Determine for a 100-kg animal that is gaining mass at a rate of 3 kg per day. dr dt ... dr dt " dm a. If the mass of an animal is changing at a rate of dt " find dr 기 dt
- - Ro.. v 12 B IU ev Av ... 3. Rank the following quantities in order from the largest to the smallest: (a) 22g, (b) 0.333kg, (c) 3.3x10 mgSuppose that Å = 2i + j, B= i– 4j + k, and = j+k. ... What is Á· (B x Č), A A. -2 В) В. -2 k с) с.-11 D) D. -11 k E) none of the choicesWhich of the following equations repreşents a power relationship? Select one: C =8+0.016 a. O b. N=14e0.01t O c. y = 3x-1 d. V =10t+3 %3D С. %3D