SMDEP Physics Instructor: Dr. Ken Rines TA: Andrew Cahoon

Ch. 2, #9(a) m/s m/s m/s m/s

Ch. 2, #9(b) m/s m/s m/s m/s

Ch. 2, #18: How long does it take? How far does car go? h, 1.1 km h, 9.9 km h, -9.9 km 4.23 s, 0.58 km

Ch. 2, #18: How long does it take? How far does car go? h, 1.1 km h, 9.9 km h, -9.9 km 4.23 s, 0.58 km

Ch 2, # m/s m/s m/s m/s m/s 2

Ch 2, #79 How long for 0.8 km stops ? 1.49 min 2.32 min 3.31 min 4.52 min 5.Too hard

Ch 2, #79 How long for 3.0 km stops ? 1.49 min 2.32 min 3.31 min 4.52 min 5.Too hard

Can an object have a=0 and v  0 simultaneously? 1.Yes 2.No

Can an object have v=0 and a  0 simultaneously? 1.Yes 2.No

Q. An object goes from one point in space to another. After it arrives at its destination, its displacement is: 1.Either greater than or equal to 2.Always equal to 3.Either smaller than or equal to 4.Either smaller or larger than …the distance it traveled

Which of the following is a reasonable description of the motion in the following graph? 1.Positive position, positive velocity, and positive acceleration at all times 2.Positive pos., positive v, and negative a at all times 3.Positive pos., negative a at all times, but v changes sign 4.Negative a at all times, but pos. and v change sign 5.Pos., v, a all change sign

 20  40 position (m) time (s)

Which of the following is a reasonable description of the motion in the following graph? 1.Positive position, positive velocity, and positive acceleration at all times 2.Positive pos., positive v, and negative a at all times 3.Positive pos., negative a at all times, but v changes sign 4.Negative a at all times, but pos. and v change sign 5.Pos., v, a all change sign