If the car in the previous problem increases its power output by 10% (by pressing the gas pedal farther down), at what rate will the car accelerate? Hint: Consider the net force. In the previous problem the power was 31.8kW

What power is required (at the wheels) for a 1400 kg automobile to climb a 4% grade at a constant speed 30 m/s while it is opposed by drag and rolling resistance forces totaling 500 N?

No chatgpt pls will upvote

As a box is lifted against gravity and placed on a shelf, how does the work done by the lifter compare with the work done by gravity?  What is the net work done on the box?  What does this imply about its change in kinetic energy?  Use definitions and mathematics from this chapter to answer these questions.

As I carry a box up a flight of stairs, am I doing positive work or negative work on the box? Provide a mathematical explanation.

As a ball falls under the influence of gravity, does gravity do positive work or negative work? Provide a mathematical explanation.

Under what circumstances is it bad to describe kinetic energy as k = 1/2mv^2

No chatgpt pls will upvote

Air temperature of 37 °C increases swimming pool temperature of 2.55 °C. What is the fraction of the water in the pool must evaporate during this time to carry enough energy to keep the temperature of the pool constant? 4186 J/(kg°C) = specific heat of water 2,430,000 (2.43 x 106) J/kg = latent heat of vaporization for the water in the pool.