Identifying Contact Forces

A book is at rest on a desk.

The book pushes ______ on the desk.

• up

• down

• left

• right

A book is at rest on a desk.

The desk pushes ______ on the book.

• up

• down

• left

• right

A Physics book is on a desk. A Chemistry book is on top of it.

Physics book pushes ______ on Chemistry book.

• up

• down

• left

• right

A Physics book is on a desk. A Chemistry book is on top of it.

Chemistry book pushes ______ on Physics book.

• up

• down

• left

• right

A Physics book is on a desk. A Chemistry book is on top of it.

Physics book pushes ______ on desk.

• up

• down

• left

• right

A Physics book is on a desk. A Chemistry book is on top of it.

Desk pushes ______ on Physics book.

• up

• down

• left

• right

A book is sliding to the right across a desk.

The book pushes ______ on the desk.

• up

• down

• left

• right

A book is sliding to the right across a desk.

The desk pushes ______ on the book.

• up

• down

• left

• right

A book is sliding to the right across a desk.

Book pulls to the ______ on the desk.

• up

• down

• left

• right

A book is sliding to the right across a desk.

Desk pulls to the ______ on the book.

• up

• down

• left

• right