Is mechanical energy conserved in projectile motion?

By mechanical energy if we mean the energy on account of its motion, then it isn't conserved. This is due to vertical component of velocity being acted by a force (gravity). read more

A projectile is launched with a speed of 40 m/s at an angle of 60 above the horizontal. Use conservation of energy to find the maximum height reached by the projectile during its flight. 2. read more

launch affect the range of the projectile, and to see that the mechanical energy of a simple projectile is conserved. Theory: Projectile Motion Projectile motion is a form of motion in which an object (called the projectile) is launched at an initial angle θ, with an initial velocity v i. Which the projectile is in flight the only force acting on it is the force of gravity (we are ignoring any air resistance). read more

The quantitative relationship between work and the two forms of mechanical energy is expressed by the following equation: KE i + PE i + W ext = KE f + PE f. The equation illustrates that the total mechanical energy (KE + PE) of the object is changed as a result of work done by external forces. There are a host of other situations in which the only forces doing work are internal or conservative forces. In such situations, the total mechanical energy of the object is not changed. read more