Answer:
Explanation:
b) Gravity reduces the initial upward velocity to zero in a time of
t = v/g = 40/10 = 4 s
a) h =  v₀t + ½gt² = 40(4) +  ½(-10)4² = 80 m
or
v² = u² + 2as
h = (0² - 40²) / 2(-10) = 80 m
 
        
             
        
        
        
The planets have (their) moons. So the answer would be planets.
        
                    
             
        
        
        
Momentum = mass x velocity 
12 = 4 x v | ÷ both sides by 4
12 ÷ 4 =v
v= 3 m/s
        
             
        
        
        
The answer is C, individuals copy works to view at a later time.
        
                    
             
        
        
        
I think it’s speed will increase, if I understood it correctly