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iogann1982 [59]

3 years ago

14

In the physics of motion a force acting over a distance is?

2 answers:

lutik1710 [3]3 years ago

8 0

A force over distance is work the unite is joules

Elan Coil [88]3 years ago

5 0

Simple a force acting over distance is the unite of joules

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A trick shot archer shoots an arrow with a velocity of 30.0 m/s at an angle of 20.0 degrees with respect to the horizontal. An a

svlad2 [7]

Answer:

$u'=10.259\ m.s^{-1}$ is the initial velocity of tossing the apple.

the apple should be tossed after $\Delta t=0.0173\ s$

Explanation:

Given:

velocity of arrow in projectile, $v=30\ m.s^{-1}$

angle of projectile from the horizontal, $\theta=20^{\circ}$

distance of the point of tossing up of an apple, $d=30\ m$

<u>Now the horizontal component of velocity:</u>

$v_x=v\ cos\ \theta$

$v_x=30\times cos\ 20^{\circ}$

$v_x=28.191\ m.s^{-1}$

<u>The vertical component of the velocity:</u>

$v_y=v.sin\ \theta$

$v_y=30\times sin\ 20^{\circ}$

$v_y=10.261\ m.s^{-1}$

<u>Time taken by the projectile to travel the distance of 30 m:</u>

$t=\frac{d}{v_x}$

$t=\frac{30}{28.191}$

$t=1.0642\ s$

<u>Vertical position of the projectile at this time:</u>

$h=v_y.t-\frac{1}{2}g.t^2$

$h=10.261\times 1.0642-\frac{1}{2} \times 9.8\times 1.0642^2$

$h=5.3701\ m$

<u>Now this height should be the maximum height of the tossed apple where its velocity becomes zero.</u>

$v'^2=u'^2-2g.h$

$0^2=u'^2-2\times 9.8\times 5.3701$

$u'=10.259\ m.s^{-1}$ is the initial velocity of tossing the apple.

<u>Time taken to reach this height:</u>

$v'=u'-g.t'$

$0=10.259-9.8\times t'$

$t'=1.0469\ s$

<u>We observe that </u> $t>t'$ <u> hence the time after the launch of the projectile after which the apple should be tossed is:</u>

$\Delta t=t-t'$

$\Delta t=1.0642-1.0469$

$\Delta t=0.0173\ s$

8 0

3 years ago

Round off to the nearest one (units place):

Elina [12.6K]

Answer:

a

Explanation:

7 0

3 years ago

Read 2 more answers

Please solve for how many drinks drinks are 1.59 each and I got 30 dollars worth of drinks

atroni [7]

Answer:

You can drink 18 drinks and 1.38 dollars left with you.

Explanation:

1 drink cost 1.59 dollars

You have 30 dollars with you.

Number of drinks in 30 dollars = $\frac{30}{1.59}$

Number of drinks in 30 dollars = 18

From division 1.36 remains as remainder so, 1.38 dollars left with you.

5 0

3 years ago

what if boy A and boy B pull the heavy cabinet at the same time in opposite directions with 10 N and 5 N of force respectedly, t

Tpy6a [65]

Answer:

side a

Explanation:

due to more force

8 0

3 years ago

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The mass of cart 1 was 1.10kg and mass of cart 2 is what's being solved for. They were next to each other and a spring was activ

klasskru [66]

M1v1 + m2v2 = m1v1i + m2v2i
fill it in m1 = mass 1
m2 = mass 2
v1 = velocity 1
v2 = velocity 2

6 0

3 years ago