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

Efficiency = (Work done / Energy input) × 100% = (4900 J / 5000 J) × 100% = 98%

W = F × s = 50 N × 2 m = 100 J

Solution:

GPE = m × g × h = 10 kg × 9.8 m/s^2 × 4 m = 392 J

Efficiency = (Work done / Energy input) × 100% = (980 J / 2000 J) × 100% = 49% Efficiency = (Work done / Energy input) ×

W = F × s

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. If the machine takes 5 seconds to lift

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.

Solution:

A 2 kg car is moving at a velocity of 4 m/s. Calculate its kinetic energy.