Time=speed/acceleration
Gravitaional Acceleration=9.8 m/s^2
Speed=24.5 m/s
Time=24.5/9.8=2.5 s
        
                    
             
        
        
        
Answer:
<em>The second option has a lower power output. P=30 W</em>
Explanation:
<u>Mechanical Power
</u>
It is a physical magnitude that measures the rate a work W is done over time t.

Since W=F.d

The first option means the worker will lift the box by a distance of 1.2 meters in 3 seconds by applying 250 N of force. That produces a power of

The second option requires the worker applies 75 N of force and travel a distance of 4 meters for 10 seconds, thus the power is

The second option has a lower power output
 
        
             
        
        
        
Answer: Glass may break at low temperatures, but this is because the contents freeze and their expansion cause the glass to crack (if the cap does not come off). ... Hot temperatures can cause the glass to break when the bottle is subject to excessive thermal variations. hope this helps can u give me brainliest
Explanation:
 
        
                    
             
        
        
        
Answer: a) 11.76 m/s  b) 7.056 m
Explanation:
The described situation is as follows:
An object is dropped from the top of a tower and when measuring the time it takes to reach the ground that turns out to be 0.02 minutes.
This situation is related to free fall, this also means we have constant acceleration, hence the equations we will use are:
 (1)
 (1)  
 (2)
 (2)  
Where:  
 Is the final velocity of the object
 Is the final velocity of the object
 Is the initial velocity of the object (it was dropped)
 Is the initial velocity of the object (it was dropped)
 is the acceleration due gravity
 is the acceleration due gravity
 is the height of the tower
 is the height of the tower
 is the time it takes to the object to reach the ground
 is the time it takes to the object to reach the ground
b) Begining with (1):
 (3)
 (3)  
 (4)
 (4)  
 (5)  This is the final velocity of the object
 (5)  This is the final velocity of the object
a) Substituting (5) in (2):
 (6)
 (6)  
Clearing  :
:
 (7)
 (7)  
 (8)  This is the height of the tower
 (8)  This is the height of the tower
 
        
             
        
        
        
Answer:
B
Explanation:
This is a physics question, know that force is equals to mass divided by acceleration (acc.), so if the same force is applied, say 10 Newton and the mass of A is 2 and the mass of B is 4, then the acceleration of A is 0.2 and that of B is 0.4 by equating, and this applies to all cases.