Kim walks her dog 5 blocks up the street and then 3 blocks back down
1 answer:
The distance covered is 8 blocks, the displacement is 2 blocks up
Explanation:
- Distance is a scalar quantity measuring the total length of the path covered by an object, regardless of the direction of its motion
- Displacement, on the other hand, is a vector quantity equal to the difference between the final position of motion and the initial position of motion. Its magnitude is equal to the shortest distance in a straight line between the initial and final point of motion.
In this problem, Kim walks the dog 5 blocks up and 3 blocks down:
- The distance is just the total length of the path taken, therefore:
- The displacement is a vector connecting the final point to the initial point. Since Kim walks 5 blocks up and 3 blocks down, her final position is
x = +5 +(-3) = +2
Which means, 2 blocks up. Therefore, the displacement is 2 blocks up.
Learn more about distance and displacement:
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Answer:
a) The strength of gravity decreases if one moved away from Jupiter
b) The strength of gravity increases if one fell into Jupiter
Explanation:
The gravitational attraction is given by Newton law of gravitation as follows;
Where;
G = The universal gravitational constant = 6.67408 × 10⁻¹¹ m³/(kg·s²)
M = The mass of Jupiter
m = The mass of the nearby body
R = The distance between the centers of Jupiter and the body
From the equation, we have that the gravitational strength varies inversely with the square of the separation distance between two bodies
Therefore, as one moves away, R increases, and the strength of gravity reduces
Similarly as the body falls into Jupiter, R, reduces the gravitational strength increases.
Answer:106560 N
Explanation:
Given
Let Tension between 2 and 3 car be and between 3 &4 is
mass of freight car =37,000 kg
acceleration of car
is accelerating all freights behind 3
therefore
Thus