Applied Mechanics and Graphic Statics
A ball which is thrown upwards, returns to the ground describing a parabolic path during its flight

Vertical component of velocity remains constant
Horizontal component of velocity remains constant
Kinetic energy of the ball remains constant
Speed of the ball remains constant

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Applied Mechanics and Graphic Statics
The force acting on a point on the surface of a rigid body may be considered to act

On any point on the line of action of the force
On the periphery of the body
At any point on the surface normal to the line of action of the force
At the centre of gravity of the body

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