AnswersHCISD-Integrated Physics and Chemistry B-CR SUMMERAccelerationQuestion 6
6
AssignmentMultiple Choice

Acceleration

Question 6 • HCISD-Integrated Physics and Chemistry B-CR SUMMER

An airplane traveling 245 m/s east experienced turbulence, so the pilot decided to slow down to 230 m/s. It took the pilot 7 seconds to get down to this speed. What is the acceleration of the plane? (Round your answer to the nearest integer.)

Answer
A
–2 m/s2
B
2 m/s2
C
67 m/s2
D
–67 m/s2

Explanation

Use acceleration = (final velocity − initial velocity) ÷ time. The plane’s acceleration is (230 − 245) ÷ 7 = −15 ÷ 7 ≈ −2.14 m/s², which rounds to −2 m/s², choice A.

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