Formative KIN-1 - Brad Smith | Laabri | Nneɛma a ɛma wotumi yɛ ade

2

Which of the following quantities does not possess both magnitude and direction?

acceleration

velocity

displacement

distance

2

Based on the motion of the cyclist in the video, what are the directions of the velocity and the acceleration? [Use a standard Cartesian Coordinate system]

The acceleration is positive and the velocity is positive

The acceleration is negative and the velocity is positive

The acceleration is positive and the velocity is negative

The acceleration is negative and velocity is negative

2

How do we interpret in words the meaning of the units of acceleration? From the terminology used in your lesson, fill in the missing words from the following statement about the meaning of 5 m/s².
"For every (a) that goes by the value of the velocity becomes more (b)____ by 5 m/s"
Type your answer for (a) then a comma, then your answer for (b). Spelling matters.

2

Which of the following correctly describes the role of the reference frame for distance, position, and speed in kinematics?

For positions and distance, the reference frame establishes a location from which to measure, called the origin. For speed, the reference frame establishes the “platform” from which speeds are gauged.

For positions and distance, the reference frame establishes a location from which to measure, called the origin. Speed, however, has no relation to a reference frame. The speed would be the same from any reference frame.

Because the reference frame is an arbitrary choice of the person viewing the event, the reference frame has no role for either the position, distance, or speed.

1

When the velocity and the acceleration have the same sign, the moving object

has zero speed (is motionless)

is decreasing in speed (slowing down)

is increasing in speed (speeding up)

2

The definition of deceleration is a negative acceleration

Nokorɛ

Ɛnyɛ ampa

2

The symbol delta (∆) in physics equations always means

first minus last

final minus initial

largest minus smallest

displacement