An object is thrown upward with an initial velocity of 40 m/s. The velocity of the object moving upward is a. negative and increasing in magnitude.

b. positive and decreasing in magnitude.

c. negative and decreasing in magnitude.

d. positive and increasing in magnitude.

b.positive and decreasing in magnitude.

Explanation:

The kinematics of a body can be calculated by means of the following expression.

where:

vf = final velocity [m/s]

vo = initial velocity = 40 [m/s]

g = gravity acceleration = 9.81 [m/s²]

t = time [s]

As we can see from the above equation, the final velocity of a body decreases its initial velocity as time increases. That is, as the body rises, the velocity decreases.