CoG - Part 1 - L16 - PHY - ATPL53

In the figure below, how could a tightrope walker avoid falling from the rope? (1 Point)

• If the walker begins to topple to one side, he/she steps backwards.

• If the walker begins to topple to one side, he/she moves the pole to the other side.

• If the walker begins to topple to one side, he/she moves the pole upwards.

• If the walker begins to topple to one side, he/she moves the pole to the same side.

Gravity of Earth attracts all objects towards the centre of Earth.

• False

• True

Centre of gravity of a freely suspended body always lies vertically below the point of suspension.

• False

• True

The position of centre of gravity of a body remains unchanged even when the body is deformed.

• False

• True

Where is the center of gravity of an aircraft located?

• Where the horizontal axis, latitudinal axis and vertical axis intersect.

• Where the longitudinal axis, lateral axis and vertical axis intersect.

• Where the longitudinal axis, latitudinal axis and horizontal axis intersect.

• Where the latitudinal axis, lateral axis and parabolic axis intersect.

How does the position of the center of gravity of a body affect whether it topples or not?

• A body topples when the horizontal line through its centre of mass falls outside its base.

• A body topples when the vertical line through its centre of mass falls outside its base.

• A body topples when the vertical line through its centre of mass falls outside its height.

• A body topples when the diagonal line through its centre of mass falls outside its entire area.

The centre of gravity of a regular object is always at its geometric centre. State True or False.

• False

• True

Define stable equilibrium in simple words.

• When an object is displaced slightly from a position, then a force acting on it makes it move back and forth.

• When an object is displaced slightly from a position, it remains displaced from its initial position.

• When an object is displaced slightly from a position, then a force acting on it takes it further away from the initial position.

• When an object is displaced slightly from a position, then a force acting on it brings it back to the initial position.

What type of equilibrium do the engineers always strive to achieve in an aircraft?

• Unstable

• Neutral

• Stable

• Negative

How can we increase the stability of an object?

• Lower the centre of gravity and increase the surface area of the base.

• Elevate the centre of gravity and keep the same surface area of the base.

• Lower the centre of gravity and decrease the surface area of the base.

• Elevate the centre of gravity and increase the surface area of the base.