ur answer is A or also known as 
When you push a child on a swing, you are doing work on the child because  you are pushing against the force of gravity
hope this helps :)
 
        
                    
             
        
        
        
Answer:
response
Explanation:
Acceleration is your changing Velocity. An object that is ACCELERATING is experiencing a change in velocity. usually positive. if an object such as a car reduces velocity, it is called deceleration 
 
        
             
        
        
        
You can't change time to a measurement of distance
        
             
        
        
        
Answer:
1 W = 1 J / sec       Definition of watt is 1 joule / sec
So if a bulb uses 75 J / sec it must use 
75 J/s * 60 sec / min = 4500 J/min    energy used by bulb
If bulb is 15% efficient then the light delivered is
P = 4500 J / min * .15 = 675 J / min