Graded Practice A race car's velocity increases from 4.0 m/s to 36 m/s over a 4.0-s time interval. What is its average acceleration? Answer here-- show work (you might want to do a picture if you use paper/pencil) The race car in the previous problem slows from 36 m/s to 15 m/s over 3.0 s. What is its average acceleration? Answer here-- show work (you might want to do a picture if you use paper/pencil)Graded Practice 12.0 Refer to the 10.0 velocity-time 8.0 graph of the Velocity (m/s) 6.0 toy train in 4.0 the figure to 2.0 answer the following 0.0 10.0 20.0 30.0 40.0 questions: Time (5) 1) When is the train's speed constant? ? 2) During which time interval is the train's acceleration positive? ? 3) During which time interval is the train's accelerations most negative? ? 4) What is the average acceleration of the train from 0.0s to 5.0s? ? 5) What is the average acceleration of the train from 15.0s to 20.0s? ?Graded Practice [ A golf ball rolls up a hill toward a miniature-golf hoEe. Assume that the direction toward the hole is positive. . Answer here show work (you might want to do a picture if you use papen'pencil} If the golf ball starts with a speed of 2.0 ms and slows at a constant rate of 0.50 mfsfs, what is its velocity after 2.0 s? Answer here show work (you might want to do a picture if you use papedpencil} What is the golf hall's velocity if the constant acceleration continues for 0.0 s? Answer here show work (you might want to do a picture if you use papen'pencil} l 1 Describe the motion of the golf ball in words: Type your answer here Graded Practice A construction worker accidentally drops a brick from a high scaffold. Answer here What is the velocity of the brick after 4.0 s? Answer here How far does the brick fall during this time? Answer here-- show work (you might want to do a picture if you use paper/pencil) A tennis ball is thrown straight up with an initial speed of 22.5 m/s. It is caught at the same distance above the ground. How high does the ball rise? Answer here-- show work (you might want to do a picture if you use paper/pencil)