An object, at time equal zero, has a velocity of 2.0 m/s and constant acceleration of 3.08 m/s². How far does it travel in 8 seconds? Do not write the units in your answer, but your answer should be in meters.
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- A car starts from 2.0 m/s and accelerates at 4.0 m/s for 6.0 s, it then coasts for 5.0 s. How far has it traveled, in meters? Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.A runner wants to run 12.2 kmkm . She knows that her running pace is 6.8 mi/hmi/h . How many minutes must she run? Hint: Use 6.8 mi/hmi/h as a conversion factor between distance and time. Express your answer using two significant figures.A car has acceleration of 4 m/s2 and starts from 1.8 m/s. What is its speed after 7.4 seconds, in m/s? Represent your answer with 3 significant figures. (Your answer should NOT have any sign nor unit, the SI unit is already given in the problem statement.)
- A pumpkin is shot straight up with an initial speed of 5.9 m/s. What is the maximum height it can reach, in meters? Use g = 10 m/s2.Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.The following data were taken on five cars traversing a 1.6-km highway. Car Time (minutes) A 1.9 B 1.2 C 1.8 D 1.1 E 1.9 Determine the traffic density, in vehicles per km. Express your answer in 2 decimal places.A car starts from 2.0 m/s and accelerates at 4.0 m/s2 for 6.0 s. How far has it traveled, in meters? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.
- A spacecraft accelerates from rest: a = bt = 0.2t until a = 10.4, after which it continues at constant acceleration 10.4. Everything is in a straight line. How much time does it take to reach 10.4? (The base units are meters and seconds.) And what are the dimensions of the number b in a = bt?An adventure racer ran 1.7 km north, then 3.2 km 63° to the south of due east, then 1.4 km west. She completed the trip in 2 hr: 5 min :8 s. What was the magnitude of her average velocity over the entire trip in m/s? Express your answer in metres/second to two decimal places (do not include units in your answer).The speed S (m/mii) of an object is defined by S = 6t² + 2t + 3 after t minutes. For the first one minute, the object travelled for 10 m. Determine how far the object travelled for the first two minutes. O 25 O 40 O 20 O 30
- A car is traveling at 30 m/s ( approximately 67 mph) on I-95 highway. The driver applies the brakes and the car comes to a stop in 4.0 s . What is the car's acceleration, in m/s2? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed.A student witnesses a flash of lightning and then t = 1.5 s later the student hears the associated clap of thunder.Sound travels at 343 m/s in the air. What distance from the student is the lightning strike, in meters? Light travels at 3.0 × 108 m/s in the air. How long, t1, in seconds did it take the light to reach the student's eyes after the lightning strike?A spacecraft accelerates from rest: a = bt = 0.2t until a = 10.4, after which it continues at constant acceleration 10.4. Everything is in a straight line. a) How much time does it take to reach 10.4? (The base units are meters and seconds.) b) what are the dimensions of the number b in a = bt? c) a(t) = bt, with b=0.4, until a(t) = A = 9.3 , How fast is it going when the acceleration reaches A? d) how far does the spacecraft travel during its time of variable acceleration? b=1.0 and A = 8.9.