Physics Flashcard on Pressure and Stability

Front

Pressure is defined as the force acting ________ to a surface, per unit area.

Back

perpendicular

Front

The ________ of an object is the single point through which all its mass can be said to act.

Back

center of mass

Front

An object is ________ if the line of action of its weight lies outside its base.

Back

unstable

Front

An ________–load graph for a spring initially forms a straight line that passes through the origin.

Back

extension

Front

The sum of the ________ moments equals the anticlockwise moments for an object in equilibrium.

Back

clockwise

Front

What is the formula for calculating pressure?

Back

Pressure = Force / Area

Front

What happens to pressure when the area increases while keeping the force constant?

Back

Pressure decreases.

Front

What is the center of mass of a uniform object?

Back

It is at the geometric center.

Front

What does it mean for an object to be in equilibrium?

Back

The sum of forces and moments acting on it is zero.

Front

What is the relationship between stability and the center of mass?

Back

Lower center of mass generally means greater stability.