Jawapan Buku Teks Fizik Tingkatan 4 Kssm Aktiviti 13 Work Work May 2026

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.

KE = ½ × m × v^2

GPE = m × g × h

KE = ½ × m × v^2 = ½ × 5 kg × (2 m/s)^2 = 10 J A machine lifts a 100 kg load to

where F is the force applied and s is the displacement of the object. A machine lifts a 100 kg load to

A 5 kg object is moving at a velocity of 2 m/s. Calculate its kinetic energy. A machine lifts a 100 kg load to

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