Anonymous

# Suppose that an object is moving with constant acceleration?

Make a statement concerning its motion with respect to time

a. In equal times its velocity changes by equal amounts.

b. In equal times its speed increases by equal amounts.

c. In equal times it moves equal distances.

d. A statement cannot be made using the information given.

Relevance
• Andy S
Lv 6

a.

Because by definition ā = ∆v/∆t

"change in velocity over change in time"

Here

∆v=k*∆t, where k is constant

• Jim
Lv 7

As you did not, and the question does not refer to the

motion as one-dimensional, I'll assume it's at least two-dimensional.

acceleration is a vector quantity and the changer of velocity

if acceleration is said to be "constant" it must be so in BOTH

size AND direction

in equal time intervals, a constant change is added to the velocity,

(a) is correct

since speed is the size of the velocity vector, it too must change equally with time if the acceleration vector is constant.

(b) is correct also

b* comment: folks will say the "centripetal acceleration" of circular motion is a "constant accleration" but this only refers to its SIZE, its direction is constantly changing so the VECTOR centripetal acceleration is not constant.

constant acceleration means increasing velocity....

a. In equal times its velocity changes by equal amounts.