Center of Mass

where is the centre of mass of this image

• at 20 mark

• at 42.5 mark

• at 50 mark

• at 100 mark

The diagrams show four solid cones. The centre of mass of each cone is marked by a point labelled M.

Which cone is the most stable

• A

• B

• C

• D

Tags

NGSS.MS-PS2-4

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

• Location 1

• Location 2

• Location 3

• Location 4

If m1 = 3 kg, m2 = 4 kg and m3 = 2 kg, find the center of mass of the system as an ordered pair (x, y). Type in your answer using sigfigs but without units and turn in your work.

The centre of mass of a body is the point at which...

• the force of gravity acts with greatest magnitude

• the body is closest to the Earth surface

• it is balanced in all directions

• it is relaxed

Tags

NGSS.MS-PS2-4

A simple method to find centre of mass of a body is usage of

• stop watch

• plumbline

• pendulum

• gauge

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

the mass of the right side is ------ compared to the left side.

• more

• less

• equal

• None of the above

Tags

NGSS.MS-PS2-2

A figure skating pair is moving together at 10 m/s. One is thrown forward at 15 m/s. The speed of the center of mass after the throw is _____? (ignore friction)

• greater than 10 m/s

• 10 m/s

• less than 10 m/s

• depends on the masses of the two skaters

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

The diagram shows an object of weight W and an object of weight Z balanced on a uniform metre

rule.

Which equation relating to W, Z, a and b is correct?

• ( W / a ) = ( Z / b )

• W x Z = a x b

• W x a = Z x b

• W x ( a + b) = Z

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2