Amir starts riding his bike up a 200-m-long slope at a speed of 21 km/h, decelerating at 0.20 m/s as he goes up. At the same instant, Becky starts down from the top at a speed of 6.0 km/h, accelerating at 0.80 m/s as she goes down. Part A How far has Amir ridden when they pass? Express your answer with the appropriate units. LA ? C= Value UnitsThe figure shows the acceleration-versus-time graph of a particle moving along the x-axis. Its initial velocity is ux = 5.00 m/S at to = 0 S. What is the particle's velocity at t = 4.00 s ? (59%) Figure 1 Of 1 a; (m/s2) Express your answer with the appropriate units. Value Units m Muss! Answer Provide Feedback A rock is dropped from the top of a tall building. The rock's displacement in the last second before it hits . . . 9 the ground is 40% of the entire distance it falls. How tall '5 the building. Express your answer with the appropriate units. A car starts from rest at a stop sign. It accelerates at 3.8 m/s2 for 6.5 s , coasts for 1.6 s , and then slows down at a rate of 3.5 m/s2 for the next stop sign. Express your answer to two significant figures and include the appropriate units. EAMC)? 8 = | Value Units How far apart are the stop signs