Maiia said:Homework Statement
A baseball is hit high into the upper bleachers of left field. After the ball lands in the bleachers, what is the work done by gravity and the work done by air resistance?
Wouldn't they both be zero because they are acting 90 degrees to the path of displacement?
Maiia said:in that case, if you were just considering the work when it hits the bleachers, the work for air resistance and gravity would both be positive, right? Which means the displacement for the ball is both down and in the direction (left/right depending on which way it is hit)?
Work done by air resistance and gravity is the amount of energy required to overcome the forces of air resistance and gravity while an object is moving. It is a measure of the work done against these forces to maintain the motion of an object.
Air resistance works against the motion of an object and causes it to slow down. This means that more energy is required to overcome air resistance and maintain the object's motion, resulting in an increase in the work done.
The work done by air resistance and gravity is influenced by the velocity of the object, the density of the air, the surface area of the object, and the mass of the object. A higher velocity, denser air, larger surface area, and greater mass will result in a higher work done.
The work done by air resistance and gravity can be calculated by multiplying the force of air resistance and gravity by the distance traveled in the direction of the force. This can be represented by the equation W = F x d.
Work done and energy are directly related. The work done by air resistance and gravity is equal to the change in kinetic energy of an object. This means that as more work is done against these forces, the object's kinetic energy decreases, and vice versa.