An object is moving to the right with speed vi when a force of magnitude F is exerted on it. In which of the following situations is the object’s direction of motion changing and kinetic energy decreasing at the instant shown? So, I know that this (pic attached) is the answer, but I don't really understand why. Can someone please provide an explanation for it? Thank you!

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

What causes the development of most clouds and precipitation in the atmosphere?

The second largest public utility in the nation is the sole provider of electricity in 32 counties of southern florida. to meet the monthly demand for electricity in these counties, which is given by the inverse demand function p = 1,200 – 4q, the utility company has set up two electric generating facilities: q1 kilowatts are produced at facility 1, and q2 kilowatts are produced at facility 2 (so q = q1 + q2). the costs of producing electricity at each facility are given by c1(q1) = 8,000 + 6q12 and c2(q2) = 6,000 + 3q22, respectively. determine the profit-maximizing amounts of electricity to produce at the two facilities, the optimal price, and the utility company’s profit