Physics 1 3.13 Force Diagrams

Jackie's Viper is parked on the shoulder of the road while she changes a flat tire. Diagram A shows a box with a downward and upward arrow equal in size Diagram B shows a box with an arrow up, down, left, and right all equal in size. Diagram C shows a box with shortest arrow pointing left, equal arrows pointing up and down, and longest arrow pointing right. Diagram D shows a box with a downward and upward arrow with the downward arrow larger in size. Which force diagram represents the forces on the Viper? You may neglect the effects of air resistance.

A

A ball that was thrown upward by Yvonne is at the top of its path. Diagram A shows a box with a downward arrow. Diagram B shows a box with an upward arrow. Diagram C shows a box with a downward and upward arrow equal in size. Diagram D shows a box with a downward and upward arrow with the downward arrow larger in size. Which force diagram represents the forces on the ball? You may neglect the effects of air resistance.

A (neglecting air resistance, the only force acting on the ball is gravity)

A ball thrown by Ginger is moving upward through the air. Diagram A shows a box with a downward arrow. Diagram B shows a box with an upward arrow. Diagram C shows a box with a downward and upward arrow equal in size. Diagram D shows a box with a downward and upward arrow with the downward arrow larger in size. Which force diagram represents the forces on the ball? You may neglect the effects of air resistance.

A (neglecting air resistance, the only force acting on the ball is gravity)

Corey's Christmas tree ornament is falling to the floor. Use the diagrams from question #1. Which free-body represents Corey's tree ornament? You may neglect the effects of air resistance.

A (neglecting the effects of air resistance, so no opposing upward force)

Eddy is driving his Camero down a straight, level road while on cruise control. Diagram A shows a box with a downward and upward arrow equal in size Diagram B shows a box with an arrow up, down, left, and right all equal in size. Diagram C shows a box with shortest arrow pointing left, equal arrows pointing up and down, and longest arrow pointing right. Diagram D shows a box with a downward and upward arrow with the downward arrow larger in size. Which force diagram represents the forces on the Camero? You may neglect the effects of air resistance.

B

Jenny pushes a cart at constant velocity down the grocery store aisle. Diagram A shows a box with a downward and upward arrow equal in size Diagram B shows a box with an arrow up, down, left, and right all equal in size. Diagram C shows a box with shortest arrow pointing left, equal arrows pointing up and down, and longest arrow pointing right. Diagram D shows a box with a downward and upward arrow with the downward arrow larger in size. Which force diagram represents the forces on the cart? You may neglect the effects of air resistance.

B

Mark's physics book is on the desk. Mark pushes horizontally (from the side) on the book, but the book does not move. Diagram A shows a box with a downward and upward arrow equal in size Diagram B shows a box with an arrow up, down, left, and right all equal in size. Diagram C shows a box with shortest arrow pointing left, equal arrows pointing up and down, and longest arrow pointing right. Diagram D shows a box with a downward and upward arrow with the downward arrow larger in size. Which force diagram represents the force on the physics book? You may neglect air resistance.

B (Mark pushes on the book, but it doesn't move, so there must be an equal opposing force acting in the opposite direction)

Kendall's physics book is on the desk. Kendall pushes horizontally (from the side) on the book, and the book moves across the desk at a constant speed. Diagram A shows a box with a downward and upward arrow equal in size Diagram B shows a box with an arrow up, down, left, and right all equal in size. Diagram C shows a box with shortest arrow pointing left, equal arrows pointing up and down, and longest arrow pointing right. Diagram D shows a box with a downward and upward arrow with the downward arrow larger in size. Which force diagram represents the force on the physics book? You may neglect air resistance.

B (at a constant velocity, the opposing horizontal forces are equal)

Matt's book is motionless on a table. Diagram A shows a box with a downward arrow. Diagram B shows a box with an upward arrow. Diagram C shows a box with a downward and upward arrow equal in size. Diagram D shows a box with a downward and upward arrow with the downward arrow larger in size. Which force diagram would represent Matt's book? You may neglect the effects of air resistance.

C

Ryan is accelerating his Dakota down a straight, level road. Diagram A shows a box with a downward and upward arrow equal in size Diagram B shows a box with an arrow up, down, left, and right all equal in size. Diagram C shows a box with shortest arrow pointing left, equal arrows pointing up and down, and longest arrow pointing right. Diagram D shows a box with a downward and upward arrow with the downward arrow larger in size. Which force diagram represents the forces on the Dakota? You may neglect the effects of air resistance.

C (accelerating, so must have one horizontal arrow longer than the other)

Mindy's Christmas tree ornament hangs motionless on a tree. Diagram A shows a box with a downward arrow. Diagram B shows a box with an upward arrow. Diagram C shows a box with a downward and upward arrow equal in size. Diagram D shows a box with a downward and upward arrow with the downward arrow larger in size. Which force diagram would represent the tree ornament? You may neglect the effects of air resistance.

C (motionless so equal forces acting on it)