Kinematics Flashcards
An object dropped from a window falls to the ground. The position-time graph representing the object’s motion would be a straight line.
True or False
False
A car accelerates uniformly when the traffic light turns green. The velocity-time graph representing the car’s motion would be a stright line.
True of False
True
A velocity-time graph that consists of a straight non-horizontal line represents an object that is travelling with uniform motion.
True or False
False
Consider one complete orbit around Earth as taken by astronaughts aborad a space shuttle. The magnitude of the average velocity is equivalent to the average speed.
True or False
False
An object is thrown vertically upward. At the top of its flight, both the object’s velocity and acceleration are momentarily zero.
True or False
False
The slope of a position-time graph represents the velocity
True or False
True
The slope of the line that joins two points on a velocity-time graph represents the average acceleration during that time interval.
True or False
True
The area under a position-time graph represents the displacement.
True or False
False
An object with a negative velocity is slowing down. The object has a positive acceleration.
True or False
True
Consider a trip from your home to your school and back home again. The magnitude of your displacement is equivalent to your distance travelled.
False
The term “uniform motion” means
a. acceleration is constant
b. speed is constant
c. velocity is constant
d. displacement is constant
e. velocity is zero
c. velocity is constant
An 84 km trip takes a time of 0.75 hours to complete. The average speed, expressed in the correct manner, is
a. 107.2 km/h
b. 1.072 x 10^2 km
c. 29.8 m/s
d. 1 x 10^2 km/h
e. 1.1 x 10^2 km/h
e. 1.1 x 10^2 km/h
The slope of a position-time graph always represents
a. displacement
b. distance
c. velocity
d. change in velocity
e. acceleration
c. velocity
The area under a velocity-time graph always represents
a. displacement
b. change in velocity
c. distance
d. acceleration
e. change in acceleration
a. displacement
The area under an acceleration-time graph always represents
a. displacement
b. distance
c. velocity
d. change in velocity
e. change in acceleration
d. change in velocity
The position-time graph pictured below represents the motions of two objects, A and B. Which of the following statements concerning the object’s motion is true?
a. Object B travels the greater distance.
b. Object A has the greater speed.
c. Object A leaves the reference point at an earlier time.
d. Both objects have the same speed at the point where the lines cross.
e. Object A is travelling for a longer period of time.
b. Object A has the greater speed
The position-time graph that depicts a ball thrown vertically upward that returns to the same position
a. A
b. B
c. C
d. D
e. E
b. B
The position-time graph that represents “uniform motion” is
a. A
b. B
c. C
d. D
e. E
a. A
The velocity-time graph pictured below represents the motion of a police car, P, in pursuit of a motorcycle, M. The motorcycle has just passed the police car. Which of the following statements is true?
a. Both vehicles are at rest when the pursuit begins.
b. The police car eventually catches the motorcycle.
c. The motorcycle accelerates and then slows down.
d. At the end of the recorded time interval, the police has yet to cath the motorcycle.
e. The police car passes the motorcycle.
d. At the end of the recorded time interval, the police has yet to cath the motorcycle.
Consider the following velocity-time graph and select the statement that is true.
a. At no time can the motion be considered “uniform”
b. The object returns to its original position.
c. The object travels in one direction and then the other.
d. The object is accelerating throughout the entire recorded time.
e. The object speeds up and later slows down.
e. The object speeds up and later slows down.
A ball is thrown vertically upward into the air. Which of the following acceleration-time graphs represents the ball’s motion?
a. A
b. B
c. C
d. D
e. E
d. D
