Question

Unit 2: Kinematics in 1-D Exam Preparation 1. A bike first accelerates from 0.0 m/s to 5.0m/s in4.5 s, then continues at this constant speed for another 4.5 s What is the total distance traveled by the bike? A car traveling at 20 m/s when the driver sees a child standing in the road. Hetakes 0.80 sto react, then steps on the brakes and sows at 7.0 m/s. How far does the car go before it stops? Answer the following questions a out the c? whose motion is graphed below: 40 30 d (m) 20 10 -10 -20 20 40 60 80 t (s) a When was the car 20 m west of the origin? b. where was the car at 50 s? c. The car suddenly reversed direction. When and where did that occur? A car starts 200 m west of the town square and moves with a constant velocity of 15 m/s toward the east Draw a graph that represents the motion of the car a Where will the car be 10 minutes later? b. When will the car reach the town square? Atthesame time theda in #4 left, atruck was 400 ment of the town squre moving west a aconstant velocity of 12 m/s 5. Add the trucksmoton to the graph you drew for question #4 b. Find the time where the car passed the truck. 6. A car is coasting backwards downhill at a speed of 3.0 m's when the driver gets the engine started. After 2.5 s the car is moving uphill a 4.5 m/'s Assuming that uphill is postive direction, what is the car's average acceleration? 7. A car slows from 22 m/s to 3.0 m/s at a constant rate of 2.1 m/s. How many seconds are required before the car is traveling 3.0 m's?

Answer 1

no ideas on any of these?
Probably too late for exam prep, then ...