Jawapan Buku Teks Fizik Tingkatan 4 Kssm Aktiviti 13 Work Work

W = F × s = 20 N × 3 m = 60 J

GPE = m × g × h = 5 kg × 9.8 m/s^2 × 2 m = 98 J W = F × s = 20 N

A 50 N force is applied to a block, causing it to move 2 m to the right. Calculate the work done on the block. calculate the efficiency:

KE = ½ × m × v^2 = ½ × 2 kg × (4 m/s)^2 = 16 J W = F × s = 20 N

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

Then, calculate the efficiency: