Grade 8 Forces

Which one is not a contact force

• Air Resistance

• Friction

• Gravity

• Impact Force

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Which one is the unit for force ?

• Newton

• Pascal

• kg

• psi

Which of the following best describes a force?

• A push or pull that changes the speed or direction of an object

• The tendency of an object to resist a change in its motion

• Measure of an object's inertia

• Direction and distance from a start point to an end point

Tags

NGSS.MS-PS2-2

Which is an accurate statement about friction forces?

• Sliding friction is weaker than static friction

• Static friction is the weakest type of friction

• Sliding friction is the strongest type of friction

• Sliding friction is weaker than rolling friction

Force acts on an object may change....

• direction

• shape

• speed

• all of the above

Tags

NGSS.MS-PS2-2

Friction can be increased by ___________

• applying lubricants

• using ball bearings

• making rough surface

• polish the surface

Which of the following is the advantage of frictional force?

• produce heat

• prevents from slipping while walking

• slide easily

• produce noise

What force holds the planets in motion around the sun?

• Magnetic
• Electrical
• Gravitational
• Air Resistance

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4