F = net force acting on the elevator in upward direction = 3000 N 
m = mass of the elevator = 1200 kg 
a = acceleration of the elevator = ?
Acceleration of the elevator is given as 
a = F/m 
a = 3000/1200
a = 2.5 m/s²
v₀ = initial velocity of the elevator = 0 m/s
Y = displacement of the elevator = 15 m 
t = time taken 
Using the kinematics equation 
Y = v₀ t + (0.5) a t²
15 = (0) t + (0.5) (2.5) t²
t = 3.5 sec 
 
        
             
        
        
        
When the force of air resistance on the skydiver 
is equal to the skydiver's weight.
        
             
        
        
        
Answer:
can someone help me with physics to 
 
        
                    
             
        
        
        
Answer:
SI unit of heat is joule and cgs unit of heat is calorie. 1 calorie = 4.18 joule.
Explanation:
 
        
                    
             
        
        
        
To solve the problem, start by applying the concepts related to current in an RL circuit. The current is defined exponentially and using Ohm's law we can put the initial current in terms of the voltage and resistance. Consecutively with the calculated time constant we can find the respective inductance. For the second part we will apply the electrical potential energy connectors to find the amount of stored energy.
PART A) 





Inductance can be defined then,



PART B) Now the energy is given under the terms:



Therefore the energy stored in the coil at this same moment is 0.0002727J