Question

at a certain instant an object is moving to the right with speed 1.0 m/s and has a constant acceleration to the left of 1.0 m/s^2. at what later time will the object momentarily be at rest?

Answer 1

For this problem, you would use the equation v=u+at. In this case, u=1 v=0 (when the object is at rest) a=-1
v=u+at
0=1+(-1)t
t=1 second

Answer 2

The later time in which the object will momentarily be at rest is determined as 1 second.

Time of motion of the object

The time of motion of the object is calcualted as follows;

v = u + at

where;

• v is the final velocity of the object

when the object stops, the final velocity is zero

0 = u + at

0 = 1 + (-1)t

t = 1 s

Thus, the later time in which the object will momentarily be at rest is determined as 1 second.

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