Force and free body diagrams

What does it mean when the vector sum of all forces is zero?

• There is no net force acting on the object

• There is a positive net force acting on the object

• There is a negative net force acting on the object

• The object is experiencing an unbalanced force

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

What does the resultant force vector involve?

• The sum of forces in the x plane

• Only the directions of the force vectors

• Combining all forces acting on an object

• Breaking down horizontal and vertical components of a vector

Tags

NGSS.MS-PS2-2

What kind of force vectors can be broken down into x and y components (horizontal and vertical components)

• All forces

• Angled forces

• Flat forces

• Forces that are straight up and down only

Galileo and Newton describe forces as:

• Any invisible thing

• A push or a pull

• A power for the Jedi

• A power manipulated by the Sith

A force that causes an object to accelerate must be:

• At least 10 N

• A balanced force

• A total of 0 net force

• An unbalanced force

Tags

NGSS.MS-PS2-2

Choose one of the following choices that happens after a balanced force hits an object

• No change in motion

• It speeds up

• It slows down

• It changes direction

For an object to be considered to be in equilibrium, what must be true?

• There must be a net force acting on the object in the x or y plane

• The force of gravity must be stronger than the normal force acting on the object

• The net force in the x and y plane must equal zero

• The force of friction must be lower than the applied force

Tags

NGSS.HS-PS2-1

What are the two types of forces described in this chapter

• Field and Contact forces

• Field and Invisible forces

• Hand force and the force

• Magnetism and Gravity forces

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NGSS.MS-PS2-5

After a football is thrown, what forces are acting on it?

• The initial contact force and gravity

• Gravity and air resistance

• Initial velocity and normal force

• Gravity and normal force

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NGSS.MS-PS2-2

NGSS.MS-PS2-4

If a soccer ball was moving to the right towards the goal with a force of 27 N, what would cause the ball to be in equilibrium?

• An equal force in the opposite direction

• An unbalanced force of gravity

• The normal force that opposes gravity

• The ball is in equilibrium because only gravity is acting on it

Tags

NGSS.MS-PS2-2