3 years ago

What is the length of the rod as measured by this ruler?

Physics

1 answer:

Simora [160]3 years ago

7 0

2.2 CM is your answer

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Determine the projection (magnitude and sign), or component, of vector v1 along the direction of vector v2. Your answer could be

professor190 [17]

Answer:

- 1.07 ft

Explanation:

V1 = (-5, 7, 2)

V2 = (3, 1, 2)

Projection of v1 along v2, we use the following formula

=\frac{\overrightarrow{V1}.\overrightarrow{V2}}{V2}

So, the dot product of V1 and V2 is = - 5 (3) + 7 (1) + 2 (2) = -15 + 7 + 4 = -4

The magnitude of vector V2 is given by

= $\sqrt{3^{2}+1^{2}+2^{2}}=3.74$

So, the projection of V1 along V2 = - 4 / 3.74 = - 1.07 ft

Thus, the projection of V1 along V2 is - 1.07 ft.

so we need to find the direction of v2

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4 years ago

A plane has a takeoff speed of 88.3 m/s and requires 1365 m to reach that speed. Determine the acceleration

Eduardwww [97]

my answer is 1276.7 because I subtracted 88.3 miles and seconds from 1365 MI

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3 years ago

An athlete runs four laps of a 400 m track. What is the athlete's total displacement?

sasho [114]

Answer:

○ 0 $\checkmark$

Explanation:

Even if the athelete runs four laps of a 400 m track, its displacement will be 0 because the displacement is the shortest distance from its to final position. And, here the final and initial position is same since he comes to its initial position after covering certain distance. So, displacement is 0.