PH-1420
Newton’s laws of motion
Physics · Secondary 4 · Medium · Newton’s laws of motion
A book of weight 15 N rests on a horizontal table. The table pushes up on the book with a force of 15 N. Using Newton’s laws, which statement about the book’s motion is correct?
- The book accelerates upwards because two forces act on it.
- The resultant force on the book is zero, so it remains at rest.
- The resultant force on the book is 15 N downwards.
- The table’s upward force is larger, so the book moves upwards at constant speed.
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