*69. GO A bus makes a trip according to the position-time graph shown in the illustration. What is the average acceleration (in km/h®) of the bus for the entire 3.5-h period shown in the graph? +40.0 B +30.0 +20.0 A +10.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 Time i (h) Positionx (km)

A car position is. determined by the equation x(t) = 7.45 m/s^3t^3+3.91 m/s^2t^2-21 m/s t+2.17 m. what is the cars acceleration at t = 7s?

1. A train leaves the station on a 50 km commute. The train must make a 60-second stopevery 1.0 km to pick up and drop off passengers. The train accelerates at 2.0 m/s2, then cruises at90 km/h, and then decelerates at 5.0 m/s2 between stops.(a.} How many stops does the train make?(b.} How long does it take for the train to get from one stop to the next?(c.} What is the total time for the entire commute?

10. A person is driving along a straight highway at a speed of 22.0 m/s when the traffic light which is 41.0 m ahead turns yellow. Because of his "reaction time", there is a delay of 0.11 s before the man steps on the brake. The car then slows with a deceleration of 4.40 m/s2. By how much distance does the driver miss the traffic light line? 50 ssi sf60 sf60 60 ssf60%

ANSWER NUMBER 1- i which is the acceleration of the tool during the first 2 s of the motion,

The position of a particle moving along the x axis is given by x= (21 + 22t - 5.0t?)m , where tis in s. What is the average velocity during the time interval t= 1.0 s to t=3.0 s? O a. 14 m/s О b. 10 m/s О с. 2 m/s O d. 18 m/s O e. 6 m/s

ates) Tılı 80 1. The following graph displays the position of an object versus time. x(t) (m) 4 ● Accessibility: Investigate 2 The acceleration is positive The velocity is negative The speed is +0.5 m/s The position is at a maximum The object is still 900 2 4 Normal tv Using the graph, match each description of motion to the correct time interval. Not all given options are answers. No Spacing H + 6 8 10 Heading 1 MacBook Air t (sec) a) 0 4 e f) only 8 < t < 10 g) t < 2 h) none of the above DII Headine ● X . Fo

A car travels in the +x-direction on a straight and level road. For the first 4.00s of its motion, the average velocity of the car is vx = 6.25m/s. How far does the car travel in 4.00s? 1.

A rocket-powered sled moves along a track, eventually reaching a top speed of 150 m/s to the west. It then begins to slow down, reaching a complete stop after slowing down for 4.21 s. What was the sled s average acceleration and velocity during the slowdown phase? 35.6 m/s^2 east, not enough information 0 m/s^2 0, 75 m/s west 35.6 m/s^2 west, not enough information

A particle moves along the x axis according to the equation x = 1.93 + 2.96t – 1.00t2, where x is in meters and t is in seconds. (a) Find the position of the particle at t = 3.10 s. (b) Find its velocity at t = 3.10 s. m/s (c) Find its acceleration at t = 3.10 s. m/s2