Physics
When an unbalanced force acts on an object

Causes change in motion of the object
Causes the object to move
All of these
The speed & direction of the object will change

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Physics
A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?

None
The liquid surface falls down on the direction of motion and rises up on the back side of the tank
The liquid surface falls down only at the center of the tank
The surface of the liquid remains horizontal

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