A Ball Is Projected Upward at Time T = 0

question 14

Multiple Choice

A ball is projected upward at time t = 0.00 s, from a point on a roof 70 m above the ground and experiences negligible air resistance. The ball rises, then falls and strikes the ground. The initial velocity of the ball is 28.5 m/s. Consider all quantities as positive in the upward direction. The velocity of the ball when it is 39 m above the ground is closest to

• A) -38 m/s.
• B) -30 m/s.
• C) -23 m/s.
• D) -15 m/s.
• E) -45 m/s.

---

Definitions:

Social Injustice Theory

A framework for understanding and analyzing social conditions that create and perpetuate inequality, discrimination, and unfair treatment of individuals or groups in society.

Exploit

To take advantage of a situation or person, often unfairly or unethically, for personal gain.

Liberation

The act of setting someone free from imprisonment, slavery, or oppression; the achievement of equal rights and freedom for a group or individual.

Biased-Based Bullying

Bullying resulting from bias against someone because of a real or perceived aspect of their identity.