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3 years ago

13

William tell shoots an apple from his son's head. the speed of the 130-g arrow just before it strikes the apple is 24.8 m/s, and

at the time of impact it is traveling horizontally.

1 answer:

shtirl [24]3 years ago

4 0

The kinetic energy of the arrow at that instant is 40 joules.

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Question 5 At 12:00 pm, a spaceship is at position ⎡⎣324⎤⎦ km ⎣ ⎢ ⎡ 3 2 4 ⎦ ⎥ ⎤ km away from the origin with respect to so

Anettt [7]

Answer:

[1, 6, -2]

Explanation:

Given the following :

Initial Position of spaceship : [3 2 4] km

Velocity of spaceship : [-1 2 - 3] km/hr

Location of ship after two hours have passed :

Distance moved by spaceship :

Velocity × time

[-1 2 -3] × 2 = [-2 4 -6]

Location of ship after two hours :

Initial position + distance moved

[3 2 4] + [-2 4 -6] = [3 + (-2)], [2 + 4], [4 + (-6)]

= [3-2, 2+4, 4-6] = [1, 6, -2]

4 0

3 years ago

HELPPP MEEEEEE PLEASEEEE

Ugo [173]

1. True

2. C, 60 x 2 = 120N

3. A , 6 m/s^2 ; a = F/m = 180/30 = 6

4. A; F= ma > m = f/a

7 0

3 years ago

Pretend you are explain net force to someone much younger than you. Explain how to calculate net force and how the net force det

jeka57 [31]

Answer:

you can tell them it is the amount of "push" on an object then you can explain using a soccer ball being kicked or a cart being pushed

Explanation:

4 0

3 years ago

When the mass is removed, the length of the cable is found to be l0 = 4.76 m. After the mass is added, the length is remeasured

ElenaW [278]

Answer:

$1242337 N/m^2$

Explanation:

The cross section area of the cable is

$A = \pi r^2 = \pi * 0.025^2 = 0.002 m^2$

Let g = 9.81m/s2. The stress acting on the cable when mass is added is

$\sigma = F/A = mg/A = 35*9.81/0.002 = 174867 Pa$

The strain when the cable is stretched from 4.76 to 5.43 m is

$\epsilon = \frac{\Delta L}{L} = \frac{5.43 - 4.76}{4.76} = 0.14$

So the young modulus of the cable is

$E = \sigma / \epsilon = 174867 / 0.14 = 1242337 Pa = 1242337 N/m^2$

4 0

3 years ago

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The process of blood cell formation is called

Andreyy89

Hemapoteisis

..........

7 0

3 years ago