W = F × s = 50 N × 2 m = 100 J
where m is the mass of the object and v is its velocity. W = F × s = 50 N
Work done = m × g × h = 50 kg × 9.8 m/s^2 × 2 m = 980 J W = F × s = 50 N
A 2 kg car is moving at a velocity of 4 m/s. Calculate its kinetic energy. W = F × s = 50 N
Solution:
A machine lifts a 100 kg load to a height of 5 m in 10 seconds. If the machine requires an input energy of 5000 J, calculate its efficiency.
GPE = m × g × h = 5 kg × 9.8 m/s^2 × 2 m = 98 J