Physics - Mechanics - Work and Energy - Kinetic energy - Kinetic Energy Problems

10 problems. P1: 'A 2kg ball moves at 5 m/s. KE = ___ J' (25). P2: 'A 1000kg car at 20 m/s. KE = ___ J' (200000). P3: 'A 0.05kg bullet at 400 m/s. KE = ___ J' (4000). P4: 'An object has KE=450J and mass=2kg. Speed = ___ m/s' (√450 ≈ 21.2, accept 21). P5: 'A 5kg object speeds up from 4 m/s to 10 m/s.