Lorenza81012viz
Answered

KE or PE
1. You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. The ball has energy. Calculate it
2.A 5-kg body moves with a speed of 7m/s. What is its kinetic energy?​

Sagot :

Erisss17viz

Answer:

1. KE=1/2×2.1kg×(30m/s)²

KE=945 kg m²/s²

convert to kJ

KE= 0.945 kJ

2. KE=1/2×5×(7m/s)²

KE=122.5 kg m²/s²

KE= 0.1225 kJ

Explanation:

.