It is conduction. Rhejrjrjejehrhrhvrbrgr
Answer:
v = dr/dt = 7t x + 0 y + (- 4) z
a = dv/dt = 7 x + 0 y + 0 z
t = 0:
v = (-4) z
a = 7 x
Explanation:
v = dr/dt = 7t x + 0 y + (- 4) z
a = dv/dt = 7 x + 0 y + 0 z
t = 0:
v = (-4) z
a = 7 x
The image shows the correct way of lining up vectors to add them together, that the two arrows lined up one after the other, therefore the correct answer is option B.
<h3>What is a vector quantity?</h3>
The quantities that contain the magnitude of the quantities along with the direction are known as the vector quantities.
Examples of vector quantities are displacement, velocity acceleration, force, etc.
Thus, the image shows the correct way of lining up vectors to add them together, that the two arrows lined up one after the other, therefore the correct answer is option B.
Learn more about the vector quantity here , refer to the link given below ;
brainly.com/question/15516363
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Answer:
a = 12 [m/s²]
Explanation:
To solve this problem we must use Newton's second law which tells us that the sum of forces on a body is equal to the product of mass by acceleration.
ΣF = m*a
where:
ΣF = sum of forces acting on a body [N] (units of Newtons)
m = mass = 0.5 [kg]
a = acceleration [m/s²]
Let's take the direction of positive forces to the right and negative forces directed to the left
2 + 8 - 4 = 0.5*a
6 = 0.5*a
a = 12 [m/s²]
Answer:
An object's acceleration is the rate its velocity (speed and direction) changes. Therefore, an object can accelerate even if its speed is constant - if its direction changes.
Explanation:
