Forces, Friction, and Newton's Laws

A force that opposes motion between two surfaces that are in contact

• Friction

• Weight

• Force

• Center of mass

An object with a mass of 2 kg accelerates 6 m/s2 when an unknown force is applied to it. What is the amount of the force?

• 4 Newtons

• 8 Newtons

• 12 Newtons

• 3 Newtons

Tags

NGSS.MS-PS2-2

An object at rest stays at rest and an object in motion stays in motion unless acted upon.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

A ball is kicked along the ground across the soccer field but stops short of the goal.

• Static friction

• Sliding friction

• Rolling friction

Tags

NGSS.MS-PS2-2

Forces that do not cancel each other out

• Balanced forces

• Net forces

• Unbalanced forces

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-3

When a force acts on an object, the object accelerates in the direction of the force.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

Tags

NGSS.HS-PS2-1

The combination of all forces acting on an object

• Unbalanced forces

• Balanced forces

• Net forces

Tags

NGSS.MS-PS2-2

A heavy box sits on the ground and doesn't move.

• Static friction

• Sliding friction

• Rolling friction

If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration?  (F=ma)

• The one with a mass of .78 kg will have the greatest acceleration.
• The one with a mass of .52 kg will have the greatest acceleration.
• They will both accelerate at the same rate.

Tags

NGSS.MS-PS2-2

A 20 kg bike accelerates at 10 m/s².  what was the force?

• 25 Newtons
• 20 Newtons
• 200 Newtons
• 10 Newtons

Tags

NGSS.MS-PS2-2