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3 years ago

14

If jack was traveling north 120 miles and it took him 3 hours to get there. what is the velocity that jack was traveling? is thi

s a scalar or vector

1 answer:

Dimas [21]3 years ago

4 0

Answers:

40 mp/h; Vector

Reason:

120/3 is 40 miles per hour.

Velocity is a vector measurement.

^.^

- Amanda

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What is the acceleration along the ground of a 10 kg wagon when it is pulled with a force of 44 N at an angle of 35Â° above the

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The acceleration of the wagon along the ground is 3.6 m/s².

To solve the problem above, we need to use the formula of acceleration as related to force and mass.

Acceleration: This can be defined as the rate of change of velocity.

⇒ Formula:

Fcos∅ = ma................. Equation 1

⇒ Where:

F = Force
∅ = angle above the horizontal
m = mass of the wagon
a = acceleration of the wagon

⇒ make a the subject of equation 1

a = Fcos∅/m..................... Equation 2

From the question,

⇒ Given:

F = 44 N
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m = 10 kg

⇒ Substitute these values into equation 2

a = 44(cos35°)/10
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a = 3.6 m/s²

Hence, The acceleration of the wagon along the ground is 3.6 m/s²

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3 years ago

What is the magnite of the net displacement of the mouse?

agasfer [191]

Complete Question

A field mouse trying to escape a hawk runs east for 5.0m, darts southeast for 3.0m, then drops 1.0m down a hole into its burrow. What is the magnitude of the net displacement of the mouse?

Answer:

The values is $s = 7.49 \ m$

Explanation:

From the question we are told that

The distance it travels eastward is $x = 5.0 \ m$

The distance it travel towards the southeast is $l = 3.0\ m$

The distance it travel towards the south is $z = 1 \ m$

Let x-axis be east

y-axis south

z-axis into the ground

The angle made between east and south is $\theta = 45^o$

The displacement toward x-axis is

$x = 5 + 3cos(45)$

$x = 7.12$

The displacement toward the y-axis is

$y = 3 * sin (45)$

$y = 2.123$

Now the overall displacement of the rat is mathematically evaluated as

$s = \sqrt{7.12^2 + 2.12^2 + 1^2}$

$s = 7.49 \ m$

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