Answer:
1min since there is no gravity on the moon so it will take time to drop on the moon.
Explanation:
 
        
             
        
        
        
Answer:
(C) Only if it starts moving
Explanation:
We know that work done is given by

So there are two case in which work done is zero 
First case is that when force and displacement are perpendicular to each other 
And other case is that when there is no displacement 
So for work to be done there must have displacement, if there is no displacement then there is no work done 
So option (c) will be the correct option 
 
        
             
        
        
        
I uploaded the answer to a file hosting. Here's link:
tinyurl.com/wpazsebu
 
        
             
        
        
        
The phrase "light year" is a <u><em>distance</em></u> ... it's the distance that light travels through vacuum in one year.
When you look at an object located 1 light year away from you, you see it as it was 1 year ago.
If a star located 10 light years away from us suddenly brightens, or dims, or explodes, we see the event <em>10 years later.</em>