Acceleration: Instantaneous and Constant Practice Sheet

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1. 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?

1. A bus that is traveling at 30 m/s speeds up at a constant rate of 3.5 m/s2. What velocity does it reach 6.8 s later?

1. Using the graph below find the instantaneous acceleration at time 2 s.

Review:https://www.youtube.com/watch?v=Ed58JZKiGEM

1. A rocket ship has several engines and thrusters. While the Solid Rocket Booster (SRB) and main engines only work together during the first 2 minutes of flight, the main engines operate for a total of 8.5 minutes after the launch. Once the SRBs are released, the main engines alone accelerate the rocket from about 1341 m/s to 7600 m/s. What is the acceleration of the SRB and main engine during thefirst 2.0 minutes of flight? [Hint: change 2 minutes to seconds and consider only the velocity of the SRB from 0 - 2 mins]

1. A sprinter in a 100 dash accelerates uniformly from rest reaching a top speed of 14.7 m/s after 6.00 seconds. He then runs at constant speed for the remainder of the race.

(a) What is his rate of acceleration during the initial phase of the race?

(b) How far did he travel in the first phase of the race?

1. Challenge Question (Extra Credit): Car 1 is traveling at a constant velocity of 22 m/s. Several meters ahead, Car 2 is stopped at a red light, as shown in Image 1.

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As the light turns green, Car 2 begins to accelerate at 4 m/s²2and Car 1 passes under the green light, as shown in Image 2.

If Car 1 does not change speed, how long will it take for Car 2 to catch Car 1?