Answer:
Correct answer: Third statement  P = 4900 W
Explanation:
Given:
m = 500 kg  the mass of the elevator
h = 10 m  reached height after t = 10 seconds
P = ? power of the motor
The formula for the calculating power of the motor is:
P = W / t 
since work is a measure of change in this case of potential energy then it is:
W = ΔEp = Ep - 0 = Ep
In this case we must take g = 9.81 m/s²
Ep = m g h = 500 · 9.81 · 10 = 49,050 W ≈ 49,000 W
Ep ≈ 49,000 W
P = Ep / t = 49,000 / 10 = 4,900 W
P =4,900 W
God is with you!!!
 
        
             
        
        
        
Answer:
work done will be equal to 305.05 J
Explanation:
We have given force exerted F = 45 N
Angle with the horizontal 
Distance moved due to exerted force d = 9.1 m 
Work done is equal to  , here F is force
 , here F is force  is angle with horizontal and d is distance moved due to force
 is angle with horizontal and d is distance moved due to force 
So work done 
So work done will be equal to 305.05 J
 
        
             
        
        
        
Answer:
a human that walks on earth
Explanation:
 
        
                    
             
        
        
        
<span>A particle released during the fission of uranium-235 is a "Neutron"</span>
        
             
        
        
        
Ionic bonding is the bonding between a positive metal with a negative nonmetal (metals are always positive while non metals are opposite). The meeting of a metal with a non metal creates an ionic bond.