An object is thrown vertically upward at 27.1 m/s. the velocity of the object 3.4 seconds later is m/s. round your answer to the nearest tenth. do not use scientific notation. take up as positive and down as negative.

-6.2 m/s (downward)

Explanation:

The velocity of an object thrown vertically upward is given by:

where:

u is the initial velocity

a = g = -9.8 m/s^2 is the acceleration due to gravity

t is the time

In this problem,

u = 27.1 m/s

t = 3.4 s

So, the velocity after 3.4 s is

and the negative sign means the velocity points downward.

a coal burning power plant

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.