estion 18 (1 point) The figure shows an acceleration-versus-force graph for a 125-g object. What should be the value of the first tick-mark on the vertical scale, as indicated by the arrow in the figure? a (m/s²) ? ? ? 0- F (N) 0 Calculator Guidelines Webcam اد
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- anb wers the question. Place your answer in the blank 2 1. Which of the following is not a unit of velocity? A. kg/s B, km/s C. m/h D. m/s . Bernice can run 100 m in 15.2 s. Correct to one decimal place, what is her average velocity in m/s? A. 6.0 m/s B. 6.2 m/s C. 6.4 m/s D. 6.6 m/s 3. Which of the following is the formula for velocity? A. V dt B. V=d C. v=L D. v=- dtQUESTION 11 Which of the following units represents a fundamental quantity? a. m3 O b. inches C. ft/s? d. m/s e. kg/m3 е.Which of the following has three significant figures? a. 0.050 km b. 305.0 cm c. 3.84 x 108 km d. None of these choices. e. 1.00281 kg
- A 2 kg watermelon is dropped from rest from a 6 m tall roof. a) Draw a sketch of the scenario. b) How fast will the watermelon be moving as it strikes the ground below? c) Determine how long it took the watermelon to strike the ground. Round your answer to the nearest tenth. d) What was the watermelon's PE(J), before being dropped? e) What was the watermelon's KE(J) when it struck the ground and f) What was the Total Energy-TE(J)?3. One newton is equivalent to: a) 1 kg · m/ s d) 1 kg / m b) 1 kg m/s? e) 1 kg m c) 1 kg - m² I s?Unit 3 Exam Vectors and 2-D Kinematics Status Exam A vector quantity has A. only a magnitude. B. a magnitude and a direction. C. only a direction. D. a mass and a density. Copuright 20og - 2021 Acellus Corporation. All Rights Reserved. MacBook SC 00 F10 F11 12 @ #3 & 1 2 3 4 6. 7 8 Q W E R Y U A S D F G H. J K .. .. * LO
- 3. Use the graph to answer the following questions. a. What physical quantity is represented by the Graph B Velocity vs. Time slope of the graph? 7 b. What physical quantity is represented by the 6 y-intercept of the graph? c. What physical quantity is represented by the area 5 under the graph? d. Find the area under the graph. 1 1 3 4 6 7 Time (sec) v (m/s) 4. onsid the following v vs. t graph a. What is the acceleration at: i. t = 11 s? ii. t = 15 s? b. How far, and in which direction, did the object travel: i. from t = 4 to t = 11 s? (sec) ip ii. from t = 13 tot = 18 s? c. During what time intervals is the object speeding up? slowing down? d. During what time intervals is the acceleration positive? Negative? Zero? Velocity (m/s)Perform the following calculations and express your answer using the correct number of significant digits. (a) A man has two bags weighing 13.5 lb and one bag with a weight of 10.2 lb. What is the total weight of the bags? (b) The force Fon an object is equal to its mass mmultiplied by its acceleration a . If a wagon with mass 55 kg accelerates at a rate of 0.0255m/s2 , what is the force on the wagon? (The unit of force is called the newton and it is expressed with the symbol N.)22. Darryl drives his load of tomatoes 14.0 km [E], 6.0 km [N], 12.0 km [N 15° E], and then 2.0 km [N 65° E]. This takes him 42 minutes" a) Calculate Darryl's distance and displacement. Draw a diagram and show work. your b) Calculate Darryl's average speed and average velocity. (Record your answers ་ in m/s.) (