Question

1. an object at rest will remain at rest. an object in motion will remain in motion unless a re acted upon it is which newton law

a. 1st
b. 2nd
c. 3rd
d. none of the above

1. ______________ is the force that opposes motion when two objects are touching.

a. force
b. motion
c. friction
d. acceleration

1. which of newtons law of motion states that force equals mass time acceleration?

a. 1st
b. 2nd
c. 3rd
d. 4th

1. a force can be which of the following

a. a push or pull
b. wind
c. water
d. all of the above

1. which is an example of velocity

a. 5 cm/s
b. 5
c. 5 cm/s north
d. 5 mph

1. how do you calculate speed?

a. distance/time
b. time/distance
c. speed/time
d. time/speed

Explanation:

1. Newton's 1st Law states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by a force.
2. Friction is the force that opposes motion between two touching objects.
3. Newton's 2nd Law is \(F = ma\) (force equals mass times acceleration).
4. A force can be a push/pull (e.g., human - applied), wind (air - movement force), or water (fluid - movement force).
5. Velocity is speed with direction. \(5\ cm/s\ north\) has both magnitude (\(5\ cm/s\)) and direction (north).
6. Speed is calculated as \(speed=\frac{distance}{time}\).

Answer:

1. A. 1st
2. C. Friction
3. B. 2nd
4. D. All of the above
5. C. \(5\ cm/s\ north\)
6. A. \(distance/time\)