A. Is the correct answer.
Answer:
The magnitude of the acceleration of the elevator is 0.422 m/s²
Explanation:
Lets explain how to solve the problem
Due to Newton's Law ∑ Forces in direction of motion is equal to mass
multiplied by the acceleration
We have here two forces 460 N in direction of motion and the weight
of the person in opposite direction of motion
The weight of the person is his mass multiplied by the acceleration of
gravity
→ W = mg , where m is the mass and g is the acceleration of gravity
→ m = 45 kg and g = 9.8 m/s²
Substitute these values in the rule above
→ W = 45 × 9.8 = 441 N
The scale reads 460 N
→ F = 460 N , W = 441 N , m = 45 kg
→ F - W = ma
→ 460 - 441 = 45 a
→ 19 = 45 a
Divide both sides by 45
→ a = 0.422 m/s²
<em>The magnitude of the acceleration of the elevator is 0.422 m/s²</em>
The distance is 20 miles
Explanation:
Definitions:
- Distance is the total length of the path covered by an object during its motion, regardless of the direction of its motion
- Displacement is the shortest distance between the initial and final position of the motion, so it also takes into account the direction of motion
In this problem, we want to know the distance covered by the woman. The motion consists of the following parts:
north
east
south
To find the distance, we just have to add the length of each path, ignoring the direction. Therefore:
Learn more about distance and displacement:
brainly.com/question/3969582
#LearnwithBrainly
Answer:
316.4 nm
Explanation:
wavelength λ of the laser = (the absolute value of the difference between the initial position and final position after the mirror has been moved ) / 100.0 fringes = 0.03164 mm ÷ 1000 = 0.00003164 m / 100 = 0.0000003164 m = 316.4 nm
