.3.3 Newton's second law in a straight line Flashcards","topicId":"ea93a3cf-a7ac-467d-b60a-e33ba427f944","topicSlug":"newton-s-second-law-in-a-straight-line","cards":[{"id":"7b927005-6488-49de-bafe-dca62e352563","cardType":"cloze","front":"

For a body of constant mass, Newton's second law is $\\text{[...]}$, where $F$ is the resultant force.

","back":"

For a body of constant mass, Newton's second law is $\\boxed{F=ma}$, where $F$ is the resultant force.

","points":null,"mcqOptions":null},{"id":"1e0db50a-87c2-4c5a-89b8-6457669867d2","cardType":"cloze","front":"

For a body of constant mass, Newton's second law is $F=ma$, where $F$ is the [ ].

","back":"

For a body of constant mass, Newton's second law is $F=ma$, where $F$ is the resultant force.

","points":null,"mcqOptions":null},{"id":"374551f1-1534-4176-a643-186ac873e6ac","cardType":"basic","front":"

What acceleration does a force of $1\\text{ N}$ give a mass of $1\\text{ kg}$?

","back":"

$1\\text{ m s}^{-2}$

","points":1,"mcqOptions":null},{"id":"bfa3dd2b-7e1b-4286-9481-ef1c40c24fed","cardType":"basic","front":"

How are forces opposite to the chosen positive direction represented?

","back":"

They have a negative sign.

","points":1,"mcqOptions":null},{"id":"378a0d59-4831-48d0-9f51-8b134aaf8d5a","cardType":"basic","front":"

How is the direction of acceleration related to the resultant force?

","back":"

They act in the same direction.

","points":1,"mcqOptions":null},{"id":"f05046bc-c2d5-4315-859b-7f408ac3e66d","cardType":"cloze","front":"

For straight-line motion, acceleration is $\\text{[...]}$.

","back":"

For straight-line motion, acceleration is $\\boxed{a=\\frac{v-u}{t}}$.

","points":null,"mcqOptions":null},{"id":"930e84b2-fc79-494e-8d1f-f6a55e9e5ca1","cardType":"cloze","front":"

Near Earth's surface, a body's weight has magnitude $\\text{[...]}$.

","back":"

Near Earth's surface, a body's weight has magnitude $\\boxed{mg}$.

","points":null,"mcqOptions":null},{"id":"2ca46350-c846-4487-87d4-a1d889c965c4","cardType":"basic","front":"

What acceleration results from balanced forces on a body of non-zero mass?

","back":"

$a=0$

","points":1,"mcqOptions":null},{"id":"1d2821a3-232c-4359-b7f1-d4ebbe2524d1","cardType":"basic","front":"

What happens to a moving body's velocity when the resultant force is zero?

","back":"

It remains constant.

","points":1,"mcqOptions":null},{"id":"69c17908-5bdb-4122-a3a2-a410e5a887af","cardType":"basic","front":"

When is a body decelerating?

","back":"

Its acceleration acts opposite to its velocity.

","points":1,"mcqOptions":null},{"id":"cb0a24db-cf40-4570-9502-b7cc8eb9c1a3","cardType":"basic","front":"

Why does negative acceleration not always mean that a body is slowing down?

","back":"

The effect depends on the direction of its velocity.

","points":2,"mcqOptions":null},{"id":"8c235b4c-ec5b-4368-9d3f-9d9690085cdd","cardType":"basic","front":"

For a fixed resultant force, what happens to acceleration when mass increases?

","back":"

Acceleration decreases, since $a=\\frac{F}{m}$.

","points":2,"mcqOptions":null},{"id":"e0fe71fe-2ab0-49dd-976d-ac7ead8a6ede","cardType":"basic","front":"

A body has $42\\text{ N}$ forwards and resistances of $10\\text{ N}$ and $8\\text{ N}$ backwards. Find the resultant force.

","back":"

$24\\text{ N}$ forwards

","points":2,"mcqOptions":null},{"id":"c9d3c1ca-b793-4d5f-a164-c522295b8c20","cardType":"basic","front":"

A force $P$ acts forwards and resistance $R$ acts backwards. Write Newton's second-law equation with forwards positive.

3.3.3 Newton's second law in a straight line Flashcards

3.3.3 Newton's second law in a straight line Flashcards