Vertically, from 20 m to 5 mCWatters said:"moves at 10m/s" in which direction? Vertically? Horizontally?
Arguably, OP's relevant equation, vf²=vi²+2ad is the energy conservation equation with a factor of (½)m multiplying both sides canceled out.CWatters said:I just noticed the title says work and energy so perhaps your tutor intended you to use conservation of energy method rather than the equations of motion.
Work in physics is defined as the product of force and displacement in the direction of the force. It is measured in joules (J) and is a measure of the energy transferred to an object by a force.
Work is calculated by multiplying the magnitude of the force applied to an object by the distance the object moves in the direction of the force. Mathematically, it can be represented as W = F*d, where W is work, F is force, and d is displacement.
In physics, energy is defined as the ability to do work. It is a scalar quantity and is measured in joules (J). There are various forms of energy, including kinetic, potential, thermal, and chemical energy.
Free fall is the motion of an object under the influence of gravity alone. This means that the object is not being supported by any other forces and is only subject to the force of gravity. In a vacuum, all objects will fall with the same acceleration due to gravity, regardless of their mass.
In free fall, the object is only subject to the force of gravity, so the work done on the object is equal to the change in its potential energy. As the object falls, its potential energy decreases and its kinetic energy increases. This relationship between work, energy, and free fall is described by the equation W = ∆PE = ∆KE.