Center of Mass and Center of Gravity

What is the center of mass?

• An imaginary point
• The average location of all of the mass in an object
• The balancing point of an object
• All of these!

Where is the center of mass for this soccer ball?

• On the surface of the ball
• Above the ball
• In the center of the ball
• To the left of the ball

Which is the most likely location of the  paintbrush's center of mass?

• Location 1
• Location 2
• Location 3
• Location 4

How do we quickly find the location of an object's center of mass if it is not symmetrical?

• Use the center of mass formula.
• Find the balance point.
• You can only estimate where the center of mass is.
• The center of mass is always in the middle.

Suppose you build a glider like the one in the diagram.
The location of the center of mass of this glider is shown as a black dot.
What will happen to this glider during the stability test?

• The glider will rotate backward so that its nose tilts up.
• The glider will rotate forward so that its nose tilts downward.
• The glider will rotate sideways.
• The glider will remain stable.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

The adjacent hoop has a diameter of 1 meter, what are the coordinates of its centre of mass

• 1,1
• 0.5,1
• 0.5,0.5
• 1,0.5

why is the car on the right more stable?

• Its centre of mass is higher
• it has a wider base
• it has more height
• all of the above

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

The centre of mass can be located in the emptiness of the object.

• yes
• no

this cupboard is filled with boxes. will it topple over ?

• it will
• it will not
• it will if the weight remains inside the base

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What is the centre of mass ?

• it is a single point at which the object can balance.
• The mass is distributed equally around it.
• the centre of gravity of the object
• All of the above