Answer:
speed equals distance over time 50 divided by 5.
 
        
             
        
        
        
For this, you need the v-squared equation, which is v(final)² = v(initial)² + 2aΔx
The averate acceleration is thus a = (v(final)² - v(initial)²) / 2Δx = (20² - 15²) / 2(50) = 175 / 100 = 1.75 m/s²
So the average acceleration is 1.75 m/s²
        
             
        
        
        
Answer:
   100 J
Explanation:
The potential energy is given by the formula ...
   PE = mgh
   = (2 kg)(10 m/s^2)(5 m) = 100 J
 
        
             
        
        
        
Answer:
Explanation:
The formula for gravitational potential energy is
Ep = m · g · h   Assuming that the acceleration is g = 10m/s² 
Ep = 45.4 · 10 · 21.9 = 9,942.6 J
God is with you!!!