*11. ssm A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 22 minutes at an average speed of 7.2 m/s. During the second part, she rides for 36 minutes at an average speed of 5.1 m/s. Finally, dur- ing the third part, she rides for 8.0 minutes at an average speed of 13 m/s. (a) How far has the bicyclist traveled during the entire trip? (b) What is her average velocity for the trip?

2. A child running around in a field has the following position and velocity at time t = 0: x = 1.5 m, y = 2.0 m Vx = -3.5 m/s, vy=-1.0 m/s At time t = 2.5 s, it has the following position and velocity: x = -2.0 m, y = 1.5 m vx = -0.50 m/s, v, = 2.0 m/s Using this information, find the child's average velocity and average acceleration during that time interval. Write your answers in unit vector notation.

Physics Question #61 is the attached image

From the top of a cliff, a person throws a stone straight downward. The initial speed of the stone just after leaving the person's hand is 9.7 m/s. (a) What is the acceleration (magnitude and direction) of the stone while it moves downward, after leaving the person's hand? magnitude     m/s2

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@ 2 9. An object initially at rest experiences an acceleration of 1.90 m/s² for 6.50 s then travels at that constant velocity for another 9.90 s. What is the magnitude of the object's average velocity over the 16.4 s interval? m/s F2 10. A person is driving along a straight highway at a speed of 22.0 m/s when the traffic light which is 43.0 m ahead turns yellow. Because of his "reaction time", there is a delay of 0.15 s before the man steps on the brake. The car then slows with a deceleration of 4.20 m/s2. By how much distance does the driver miss the traffic light line? # 3 80 F3 $ 200 F4 m % 5 F5 ^ 6 Submit Assignment MacBook Air & 7 ◄◄ F7 CO * 8 DII FB ( F9 ) 0 A F10 F11 +11 = 4) 品 F12 } delete

A red Mazda Miata (type of car) accelerates from rest at a rate of a₁ in the positive x direction for a total of 20.0 seconds. The Mazda then holds their speed and direction constant for a 20.0 additional seconds. Finally, while continuing in the positive x direction, the Mazda slows down at a rate of a2 until the car stops moving. We want to determine the total distance traveled by the Mazda and the average speed of the car if we know a₁ and ₂. (A) Sketch a graph of velocity versus time for this short trip. Label the time axis to indicate which portions of the curve(s) correspond to the above intervals. Identify and write knowns and unknowns (B) Without using numerical values, determine which physics equations of motion will help solve this problem. Simplify as useful for this particular case. (C) If a₁ = 2.0 m/s² and a₂ = -3.0 m/s² determine the total distance traveled during all intervals and the average velocity of the Mazda.

A sports car starts from rest at an intersection and accelerates toward the east on a straight road at 7.0 m/s2m/s2. Just as the sports car starts to move, a bus traveling east at a constant 16 m/sm/s on the same straight road passes the sports car. When the sports car catches up with and passes the bus, how far has the sports car traveled?

1. The cheetah can reach a top speed of 114 km/h. while chasing its prey in a short sprint, a cheetah starts from rests and runs 45 min in a straight line, reaching a final speed of 72 km/h. a. Determine the cheetah's average acceleration during the short sprint, and b. Find its displacement at t= 3.5 s O 4.4m/s2, 27m O 5.6m/s2, 56m O 1.2m/s2, 15m

The graph shows velocity vs. time. Which option best describes the average acceleration from 40 to 70 s?