Solution:
KE = ½ × m × v^2 = ½ × 2 kg × (4 m/s)^2 = 16 J
A 20 N force is applied to a block, causing it to move 3 m to the right. Calculate the work done on the block. Solution: KE = ½ × m × v^2
A machine requires an input energy of 2000 J to lift a 50 kg load to a height of 2 m. If the machine takes 5 seconds to lift the load, calculate its efficiency.
Energy is the ability to do work. There are two main types of energy: kinetic energy and potential energy. If the machine takes 5 seconds to lift
KE = ½ × m × v^2
Gravitational potential energy is the energy an object possesses due to its height above the ground. The gravitational potential energy (GPE) of an object is given by the equation: KE = ½ × m × v^2 Gravitational
Work is defined as the product of the force applied to an object and the displacement of the object in the direction of the force. Mathematically, work (W) is represented by the equation: