Force and Motion

Gravity is an example of a ________ force.

• pull

• rotational

• push

• frictional

Tags

NGSS.MS-PS2-4

When an object is dropped, which force is in action as it falls to the ground?

• upthrust

• air resistance

• gravity

• water resistance

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

The heavier the object, the ​ (a)  

• greater the Earth's gravitational pull.
• the greater the object's gravitational pull.
• weaker the Earth's gravitational pull.
• the weaker the object's gravitational pull.

Tags

NGSS.MS-PS2-4

Gravity pulls an object ​ (a)  

• towards the centre of the Earth.
• towards the Earth's surface.
• to the floor.

Tags

NGSS.5-PS2-1

If two objects of different masses are dropped from the same height at the same time, the object with the ​ (a)   mass will hit the ground first.

• greater
• lighter

Tags

NGSS.MS-PS2-4

Friction is a force that requires ___________ between 2 surfaces.

• motion

• movement

• contact

When there is more contact or pressure between 2 surfaces, there is __________ friction.

• less

• more

• the same

• no

Adding a lubricant to one or both of the surfaces in contact will...

• maintain the same friction.

• reduce friction.

• increase friction.

• do nothing.

Organize these options into the right categories

Groups:

(a) Not much friction

,

(b) Lots of friction

• a car breaking

• slipping on a polished floor

• a bar of soap slipping

• twisting a bottle cap

• sand paper on wood

• ice skating

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

Air resistance is a force that...

• maintains an object's speed in the air.

• slow objects down as they move through the air.

• speeds objects up as they move through the air.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5