Physics - Mechanics - Work and Energy - Power - Power Calculations

10 problems. P1: 'A crane lifts 200kg by 15m in 10s. Power = ___ W' (3000). P2: 'A car engine produces 50kW and the car moves at 25 m/s. Driving force = ___ N' (2000). P3: 'A pump moves 500kg of water up 10m in 50s. Power = ___ W' (1000). P4: 'A 70kg runner climbs 100 steps (total height 30m) in 60s