Review // 7.01 -7.03 // Forces and Newton's 1st Law

The upward frictional force on an object falling through the air is called______.

• terminal velocity

• inertia

• air resistance

• gravity

Tags

NGSS.HS-PS2-1

When two forces on the same object are equal and opposite, these forces are called _____forces.

• Unbalanced

• Balanced

• Frictional

• Net

According to Newton's 1st law, an object in motion with no unbalanced forces acting on it will

• slow down and stop completely

• slow down but not stop

• continue to move at a constant speed

• accelerate

Which of the following is true about this free-body diagram?

• the forces are balanced

• the object is moving upward

• the object is free-falling

• the forces are unbalanced

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What is the net force

• 10 N
• 0 N
• 25 N
• 1 N

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the net force?

• 40 N left
• 0 N Balalnced
• 400 N right
• 40 N right

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the net force?

• 400 N Up
• 400 N Down
• - 400 N Down
• 800 N Down

Tags

NGSS.MS-PS2-2

If the forces on an object are balanced, what is true?

• The object is definitely moving

• The object is definitely not moving

• The object is accelerating

• The object is either moving at a constant speed or not moving at all

If forces on an object are unbalanced, which is true?

• The object will accelerate in the direction of the force

• The object's motion will change by speeding up or slowing down

• The object will continue moving at a constant speed

• The object will stop only

Tags

NGSS.MS-PS2-2

Rank the frictional forces from strongest to weakest.

• static, sliding, rolling

• rolling, sliding, static

• sliding, static, rolling

• they are equal in strength