1. Velocity
2. Time
3. Idk
4. Idk
5. D. I think it may be A. but I think D.
Answer:
13.23J
Explanation:
PE = m*g*h
PE = (3 kg ) * (9.8 m/s/s) * (0.45 m)
Speed= distance/ time so distance = speed * time= 28 * 20= 560m .. so the answer is 560m.. l hope it helped :)
5.6 g/ml. That is the density.
