1)Define east as the negative direction and west as the positive direction. Whic
ID: 2135725 • Letter: 1
Question
1)Define east as the negative direction and west as the positive direction. Which of the following statement is FALSE? a) If a car is traveling east, its acceleration must be eastward. b) If a car is slowing down, its acceleration may be positivec)An object with constant nonzero acceleration can never stop and stay stopped
d)The velocity of a car must stop momentarily if it has to change direction
2)The coordinate of a particle in meters is given by x(t) = 16t -3.0t^3, where the time t is in seconds. What is the speed of the particle at t = 2.0 s?
a) 8.0 m/s b) -20 m/s
c) -8.0 m/s
d)-36 m/s
e) 20 m/s
3)From the given a velocity (m/s) versus time (s) graph, during the first 8 seconds 1)Define east as the negative direction and west as the positive direction. Which of the following statement is FALSE? a) If a car is traveling east, its acceleration must be eastward. b) If a car is slowing down, its acceleration may be positive
c)An object with constant nonzero acceleration can never stop and stay stopped
d)The velocity of a car must stop momentarily if it has to change direction
1)Define east as the negative direction and west as the positive direction. Which of the following statement is FALSE? a) If a car is traveling east, its acceleration must be eastward.
2)The coordinate of a particle in meters is given by x(t) = 16t -3.0t^3, where the time t is in seconds. What is the speed of the particle at t = 2.0 s?
a) 8.0 m/s b) -20 m/s
c) -8.0 m/s
d)-36 m/s
e) 20 m/s
3)From the given a velocity (m/s) versus time (s) graph, during the first 8 seconds
Define east as the negative direction and west as the positive direction. Which of the following statement is FALSE? If a car is traveling east, its acceleration must be eastward. If a car is slowing down, its acceleration may be positive An object with constant nonzero acceleration can never stop and stay stopped The velocity of a car must stop momentarily if it has to change direction The coordinate of a particle in meters is given by x(t) = 16t -3.0t^3, where the time t is in seconds. What is the speed of the particle at t = 2.0 s? 8.0 m/s -20 m/s -8.0 m/s -36 m/s 20 m/s From the given a velocity (m/s) versus time (s) graph, during the first 8 seconds C has decreasing velocity and D has increasing velocity C and D both have decreasing velocities C and D have the same velocity C has the same average velocity as D
Explanation / Answer
1. a) & c)
2.v=16-9t^2
=-20m/s
3.b
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