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Efficiency = (Work done / Energy input) × 100% = (980 J / 2000 J) × 100% = 49%
KE = ½ × m × v^2
First, calculate the work done:
GPE = m × g × h = 5 kg × 9.8 m/s^2 × 2 m = 98 J Efficiency = (Work done / Energy input) ×
W = F × s = 20 N × 3 m = 60 J
Kinetic energy is the energy of motion. An object possesses kinetic energy when it is moving. The kinetic energy (KE) of an object is given by the equation: Efficiency = (Work done / Energy input) ×
A 10 kg object is lifted to a height of 4 m above the ground. Calculate its gravitational potential energy. Efficiency = (Work done / Energy input) ×