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Answer: The velocity with which the sand throw is 24.2 m/s.
Explanation:
Explanation:
acceleration due to gravity, a =  3.9 m/s2
height, h = 75 m
final velocity, v = 0
Let the initial  velocity at the time of throw is u.
Use third equation of motion
The velocity with which the sand throw is 24.2 m/s.
 
        
             
        
        
        
Answer:
Matter is anything that has mass and occupies space. The flame itself is a mixture of gases (vaporized fuel, oxygen, carbon dioxide, carbon monoxide, water vapor, and many other things) and so is matter. <em><u>The light produced by the flame is energy, not matter.</u></em>
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<em>1</em><em>.</em><em>259ms^2</em>
Explanation:
since, WORK DONE = FORCE*DISTANCE
AND, FORCE=MASS*ACCELERATION
SO, THE WORK DONE BECOMES=MASS*ACCELERATION*DISTANCE
 ACCELERATION=WORK/(MASS*DISTANCE)
AND, WORK=686J
 MASS=227kg
 DISTANCE=2.4m
THEREFORE, ACCELERATION=686/(227*2.4)
 =686/544.8
 =1.259ms^2
 
        
             
        
        
        
Potential energy = mgh
Potential energy = 10 x 9.8 x 1.3 
Potential energy = 127.4 J