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Delicious77 [7]

3 years ago

15

What determines the path that an object in projectile motion follows? (Ignore air resistance)

1 answer:

blondinia [14]3 years ago

8 0

Gravity only determines the path in projectile motion

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A car is driving northwest at v mph across a sloping plain whose height, in feet above sea level, at a point n miles north and e

coldgirl [10]

Refer to the diagram shown.

Given:
$h(n,e) = 1500 + 75n + 50e$

Define
$\hat{r} = unit \, vector \, along \, \vec{v} \\ \hat{i} = unit \, vector \, east \\ \hat{j} = unit \, vector \, north \\ \nabla \equiv \hat{i} \frac{\partial}{\partial e} + \hat{j} \frac{\partial}{\partial n}$

$\hat{r} = \frac{1}{ \sqrt{2} } (-\hat{i}+\hat{j} )$

Then the rate of change of h with respect to the vector v is
$\nabla h . \hat{r} = \frac{1}{\sqrt{2}}(50\hat{i} + 75\hat{j}).(-\hat{i}+\hat{j}) = \frac{1}{\sqrt{2}} (-50+75) =17.68$

Answer: 17.7 ft per mile

3 0

3 years ago

1)<br> How much time does it take to lift a box using 18.0 J of work and 20.89 Watt of power?

oee [108]

Answer:.

Explanation:

Z

7 0

3 years ago

What happens when light bounces off an object

Sever21 [200]

Absorbtion consists of when light strikes on an object and bounces off.

3 0

3 years ago

Read 2 more answers

A particle moving along the x-axis has a position given by x = (24t – 2.0t 3 ) m, where t is measured in s. What is the magnitud

Vitek1552 [10]

<h2>The magnitude 24 ( $\dfrac{m}{s^2}$ ) of the acceleration of the particle when the particle is not moving.</h2>

Explanation:

Given,

A particle moving along the x-axis has a position given by

$x=(24t-2.0t^3)$ m ........ (1)

To find, the magnitude ( $\dfrac{m}{s^2}$ ) of the acceleration of the particle when the particle is not moving = ?

Differentiating equation (1) w.r.t, 't', we get

$\dfrac{dx}{dt} =\dfrac{d((24t-2.0t^3))}{dt}$

⇒ $\dfrac{dx}{dt} =24(1)-3(2.0)t^{2} =24-6t^{2}$ ....... (2)

⇒ $24-6t^{2} = 0$

⇒ $t^{2}=2^{2}$

⇒ t = 2 s

Again, differentiating equation (2) w.r.t, 't', we get

$\dfrac{d^2x}{dt^2} =-12t$

Put t = 2, we get

$\dfrac{d^2x}{dt^2} =-12(2)=24$

Thus, the magnitude 24 ( $\dfrac{m}{s^2}$ ) of the acceleration of the particle when the particle is not moving.

3 0

4 years ago

Tony brought 9 2/3pitchers of juice to a volleyball game, and the players drank3 7/8pitchers of it. How much juice is left?

kifflom [539]

Rewrite the amounts as improper fractions:

9 2/3 = 29/3

3 7/8 = 31/8

Rewrite both fractions with a common denominator

29/3 = 232/24

31/8 = 93/24

Now subtract: 232/24 - 93/24 = 139/24

Rewrite as a proper fraction: 5 19/24

Answer 5 19/24

8 0

3 years ago