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Is Matter Around Us Pure

Question
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A man pushes a box of mass 50 kg with a force of 80 N. What will be the acceleration of the box due to this force? What would be the acceleration if the mass were halved?

Solution

Case 1:
Mass of the body, m = 50 kg
Force acting on the body, F = 80 N
therefore space space Acceleration comma space space space space straight a space equals space straight F over straight m space equals space 80 over 50 space equals 1.6 space straight m divided by straight s squared.
C a s e space 2 colon space space

M a s s comma straight m space equals 25 space kg

F o r c e comma space straight F space equals space 80 space straight N
therefore space space space Acceleration comma space space space straight a space equals space straight F over straight m space equals 80 over 25 space equals space 3.2 space straight m divided by straight s squared. space