Jawapan Buku Teks Fizik Tingkatan 4 Kssm Aktiviti 13 Work Work [ 90% Easy ]

Work done = m × g × h = 50 kg × 9.8 m/s^2 × 2 m = 980 J

Solution:

KE = ½ × m × v^2 = ½ × 2 kg × (4 m/s)^2 = 16 J Work done = m × g × h = 50 kg × 9

W = F × s = 50 N × 2 m = 100 J

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. Work done = m × g × h = 50 kg × 9

W = F × s

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: Work done = m × g × h = 50 kg × 9