(a) A ball is moving upward, acted on by a downward gravitational force. Is the kinetic energy of the ball increasingor decreasing? Is the work done by the gravitational force positive or negative?(b) A ball is falling downward, acted on by a downward gravitational force. Is the kinetic energy of the ballincreasing or decreasing? Is the work done by the gravitational force positive or negative?(c) A car is moving to the left, and Superman pushes on it to the right to slow it down, backing up to the left as hepushes to the right. Is the kinetic energy of the car increasing or decreasing? Is the work Superman does positiveor negative?(d) You throw a ball downward. Is the kinetic energy of the ball increasing or decreasing? Do you do positive workor negative work?

(a) A ball is moving upward, acted on by a downward gravitational force. Is the kinetic energy of the ball increasing or decreasing? Is the work done by the gravitational force positive or negative?...

(a) A ball is moving upward, acted on by a downward gravitational force. Is the kinetic energy of the ball increasing

or decreasing? Is the work done by the gravitational force positive or negative?

(b) A ball is falling downward, acted on by a downward gravitational force. Is the kinetic energy of the ball

increasing or decreasing? Is the work done by the gravitational force positive or negative?

pushes to the right. Is the kinetic energy of the car increasing or decreasing? Is the work Superman does positive

or negative?

(d) You throw a ball downward. Is the kinetic energy of the ball increasing or decreasing? Do you do positive work

or negative work?

May 26, 2022