Jawapan Buku Teks Fizik Tingkatan 4 Kssm Aktiviti 13 Work Work Page

GPE = m × g × h = 5 kg × 9.8 m/s^2 × 2 m = 98 J

Work done = m × g × h = 100 kg × 9.8 m/s^2 × 5 m = 4900 J GPE = m × g × h = 5 kg × 9

where F is the force applied and s is the displacement of the object. calculate the efficiency:

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

KE = ½ × m × v^2 = ½ × 2 kg × (4 m/s)^2 = 16 J

Then, calculate the efficiency: