Answer:
0.687 m/s
Explanation:
Initial energy = final energy
1/2 mu² = mgh + 1/2 mv²
1/2 u² = gh + 1/2 v²
Given u = 2.00 m/s, g = 9.8 m/s², and h = 0.180 m:
1/2 (2.00 m/s)² = (9.8 m/s²) (0.180 m) + 1/2 v²
v = 0.687 m/s
 
        
                    
             
        
        
        
On a Fahrenheit thermometer, the gas becomes 18 degrees warmer.
 
        
             
        
        
        
Answer:
 v = -14 m/s
Explanation:
Given that,
Initial location of the ball, X₁ = 10 m
Final position of the ball,  X₂ = -25 m
Time taken to travel is, t = 2.5 s
The average velocity of the ball is given by the formula, 
                        V = X₂ - X₁ / t     m/s
Substituting the values in the above equation,
                        V = -25 - 10 / 2.5
                           = -14 m/s
The negative sign in the velocity indicates that ball rolls in the opposite direction.
Hence, the average velocity of the ball is  v = -14 m/s
 
        
             
        
        
        
Answer:
They are able to balance torques due to gravity.

Explanation:
When two friends of different masses will balance themselves on see saw then at equilibrium position the see saw will remain horizontal
This condition will be torque equilibrium position where the see saw will not rotate
Here we can say

here we know that force is due to weight of two friends
and their positions are different with respect to the lever about which see saw is rotating
since both friends are of different weight so they will balance themselves are different positions as per above equation