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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- 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 kganb 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.
- 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)?Assume that a student came up with an equation as S= k amt" where S is the distance, a is the acceleration and tis the time. If the constant k has a dimension of L/T, find the values of the integers n and m. Select one: O A. n=-8, m=-8 OB. n=-7, m37 OC. n=7, m=-7 OD. n=7, m3-8 OE n=-7, m=-8 Clear my choiceThe speed of a vehicle is 71 km / h . How much is this speed in S.I units ? choose a -150.86 m / s b -19.72 m / s c.255.60 m / s d . 31.73 m / s
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- 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.)A rock is dropped from the top of a building. Rock starts from rest and it takes 7 seconds to reach the ground. How far did the rock travel in 7 seonds. Ignore air drag and friction. Use g =9.8m/s2. (Don't round your answer). Choose correct answer with the correct unit. A. 240.1 m/s B. 240.1 m C. 34.3 m/s D. 34.3 m4. The table gives the height s in kilometres of a rocket t seconds after take off: 25 50 75 100 150 15 28 60 130 1 Rememberings = ut + a. Find Pearson's correlation coefficient for an appropriate graph. Check b. Find the rocket's acceleration in m/s. Check Save