Unbalanced Force Causes a Change in Motion

What is the unit of force?

• Kilogram
• Meter
• Pascal
• Newton

The total amount of forces acting on an object is called...

• Contact Force
• Balanced Force
• Unbalanced Force
• Net Force

Tags

NGSS.MS-PS2-2

Which of the following has a net force of 0 Newtons?

• An asteroid moving at a constant speed through space 
• A car accelerating from a stop sign
• A box of dishes falling from a counter 
• A rocket taking off 

(T or F?) A balanced force is only an object that is not moving. 

• True 
• False

To calculate net force you must

• Add the forces

• Subtract the forces

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the net force on this box?

• 30 N left
• 25 N right
• 5 N left
• 55 N right

Tags

NGSS.MS-PS2-2

Which could be an example of an unbalanced force?

• A plate sitting on a dining table
• A ball at the top of a hill that is not moving
• A soccer ball kicked in space, traveling at a constant speed
• A baseball that has just been thrown to home plate.

Tags

NGSS.MS-PS2-2

When an object has a net for that is GREATER than 0 Newtons, the object is...

• balanced and still
• balanced and moving at a constant speed
• unbalanced and accelerating
• unbalanced and still

Tags

NGSS.MS-PS2-2

Why does a book on a table not move?

• No forces are acting on the book
• Gravity is the only force acting on the book
• The forces of the table pushing up and gravity pulling down are balanced

For an object to remain at rest, which of the following must be true?

• The forces on it are balanced.

• There is no friction.

• Gravity does not act on it.

• The object has no mass.

Tags

NGSS.MS-PS2-2