Slavery took on what new dimensions with the Age of Imperialism? Europeans were in agreement that slavery was the only labor option available.

Imperialists found the indigenous colonial populations an enduring source of labor

Imperialists looked to Africa to supply cheap labor for their colonies.

As Europeans discovered more natural sources to exploit, they also found more people to enslave

Imperialists looked to Africa to supply cheap labor for their colonies.

Explanation:

European colonies were established to generate profit for the crowns of their countries, during imperialism. In order to increase profit from colonial exploitation, European empires sought a cheap way to obtain large-scale labor. Firstly, they tried to dominate the natives and make them work forcibly in the economic productions of the colonies, however this practice was severely prohibited by the Catholic Church, forcing the imperialists to look for other forms of labor. For this reason, Europeans began an enslavement of Africans, which proved to be cheap and legalized, giving many profits to the empires.

we can solve this via the kinematic equation:

where the vertical velocity is zero and so:

since the height of the building is 29.3 meters then:

the ball was in motion for approximately 2.45 seconds