A graph of v(t) is shown for a world-class track sprinter in a 100-m race. (See figure below). Runner Velocity va. Time 14 12 10 10 12 Time (s) (a) What is his average velocity for the first 4 s? ]m/s (b) What is his instantaneous velocity at t = 6 s? m/s (c) What is his average acceleration between O and 4 s? m/s? Velocity (m/s)
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- Ce A webassign.net/web/Student/Assignment-Responses/submit?dep=27519463&tags=autosave#question3572106_11 (h) 0.0207 3 DETAILS A walker covers a distance of 2.2 km in a time of 32 minutes. What is the average speed of the walker for this distance in km/h? km/h 5. DETAILS A tortoise and a hare cover the same distance in a race. The hare goes very fast for brief intervals, but stops frequently, whereas the t hare. (a) Which of the two racers has the greater average speed over the duration of the race? OThe tortoise has the greater average speed since he was the winner. The hare has the greater average speed since he can go faster. Their average speeds are equal. OIt's impossible to determine who had the greater average speed without collecting data. (b) Which of the two racers is likely to reach the greatest instantaneous speed during the race? OThe tortoise has the greater instantaneous speed since he was the winner. OThe hare has the greater instantaneous speed since he can go faster.A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, and then returns to its starting point. This trip takes 0.75 hr. a) What was the bear's average speed? b) What was the bear's average velocity?A student begins at rest and then walks north at a speed of v1=0.65m/s. The student then turns south and walks at a speed of v2=0.28m/s. Take north to be the positive direction. a)What is the student's overall average velocity vavg, in meters per second, for the full trip assuming the student spent equal times at speeds v1 and v2? b) If the student travels in the stated directions for 30.0s30.0s at speed v1 and 20.0s at speed v2, what is the net displacement, in meters, during the trip? c) If it takes the student 1.2s to reach the speed v1, from rest, what is the magnitude, in meters per squared second, of the student’s average acceleration during that time?
- D openvellum.ecollege.com/course.html?courseld%3D17139499&OpenVellumHMACE29)02ACIOTUTU Compute the average acceleration during the time interval t = 0 to t = 10s. Express your answer using two significant figures. The figure (Figure 1) shows the velocity of a solar- powered motorhome (RV) as a function of time. The driver accelerates from a stop sign, cruises for 20 s at a constant speed of 60 km/h, and then brakes to come to a stop 40 s after leaving the stop sign. aav Submit Request Answer Part B Compute the average acceleration during the time interval t = 30s to t = 40s. Express your answer using two significant figures. aay = Figure 1 of 1 (31 of 1 > Submit Request Answer U (km/h) 09 Part C 50 40 Compute the average acceleration during the time interval t = 10s to t = 30s. 30 Express your answer using two significant figures. 20 1. 5 10 15 20 25 30 35 40 (s) 1 - Aav IIThe figure shows an acceleration- time graph of a particle with a starting velocity at 60 m/s and the distance travelled is 200 meters at 10 seconds. Draw the (v-t), and (s-t) graphs of the particle. Determine the total distance travelled and its velocity at 18 seconds. 4m/s? 10s te14s t= 18s Am/sAn object has an acceleration defined by the equation a=5t+4 (m/s^2) where "t" is in seconds. The initial velocity of the object is -10 m/s and started at a position s = 40m. 1. What is the initial magnitude of the acceleration of the object? Express your answer in unit of m/s^2 2. What is the velocity of the object after 4s? Express your answer in unit of m/s. 3. What is the position of the object after 4s? Express your answer in unit of m.
- A honda civic is driven at 20 m/s for 12 mins, then 40 m/s for 20 min, and finally at 50 m/s for 8 min. a.) calculate the average speed over the interval. b.) How fast must the honda civic move in the last 8 mins of travel to obtain an average spee of 55 m/s?A cheetah accelerates from rest to a maximum velocity of 22.0 i m/s in 2.00 seconds, whilst running in a straight line. Calculate the average acceleration in m/s2. Give your answer to 3 significant figures. You do not need to write units in the answer box.An object is moving to the right with a constant speed of 21 m/s for 5.0 s. What is the acceleration of the object, in 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.
- At time t = 0 a particle starts moving along a line with equation of motion s(t) = t^3−4t^2+ 6, whereS is meters and t is in seconds.a) Give the velocity and acceleration functions.b) What is the velocity at time t = 2?c) When is the acceleration 2 m/s^2?A jet accelerates at a constant rate from rest, traveling 900 m in 3.0 s. What is the magnitude of its acceleration, in m/s?? 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.Given the equation of the displacement x of a certain object at any time t x = 2t + 3t² + 10, in meter a. What is the velocity of the object at time t = 5 seconds? b. What is the acceleration of the object at time t = 10 seconds? Note: Velocity is the first derivative of displacement. Acceleration is the second derivative of displacement.