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AleksandrR [38]
3 years ago
6

Two trees have perfectly straight trunks and are both growing perpendicular to the flat horizontal ground beneath them. The side

s of the trunks that face each other are separated by 1.1 m. A frisky squirrel makes three jumps in rapid succession. First, he leaps from the foot of one tree to a spot that is 0.9 m above the ground on the other tree. Then, he jumps back to the first tree, landing on it at a spot that is 1.7 m above the ground. Finally, he leaps to the other tree, now landing at a spot that is 2.3 m above the ground. What is the magnitude of the squirrel's displacement?
Physics
1 answer:
galina1969 [7]3 years ago
6 0

Answer:

2.55 m.

Explanation:

Displacement is the shortest distance between initial and final position . In the present case this distance forms the hypotenuse of the triangle having base equal to 1.1 m and perpendicular equal to 2.3 m .

Hypotenuse H then

H² = 1.1² + 2.3²

H = 2.55 m.

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A metal conduit will be used as a pathway for wiring through a concrete block. The conduit is a 4 foot long rod with an outer di
AlekseyPX

Answer:510. 12 cm^3

The volume of a cylindrical conduit, V=\pi (r_2^2-r_1^2) h

where r_1 is the inner radius, r_2 is the outer radius, h is the length.

First of all, we would covert each parameter into centimeters.

length of the conduit, h=4 ft=4\times 30.48 cm=121.92 cm

outer radius, r_1=2.2/2 in =1.1 in= 1.1\times 2.54 cm=2.79 cm

inner radius, r_1=2/2 in =1 in= 2.54 cm

Insert the values in the volume formula,

V=3.14 \times (2.79^2-2.54^2) \times 121.92 cm^3=510. 12 cm^3

Hence, the volume of metal in the conduit is 510. 12 cubic centimeters.

7 0
3 years ago
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A massless spring with force constant ????=200N/m hangs from the ceiling. A 2.0-kg block is attached to the free end of the spri
Makovka662 [10]

Answer:

-0.4454 Joules

Explanation:

m = Mass of block = 2 kg

h = Height of extension = 17 cm = x

g = Acceleration due to gravity = 9.81 m/s²

Potential energy of the spring

P=mgh\\\Rightarrow P=2\times 9.81\times 0.17\\\Rightarrow P=3.3354\ J

The kinetic energy of the spring

K=\frac{1}{2}mx^2\\\Rightarrow K=\frac{1}{2}\times 200\times 0.17^2\\\Rightarrow K=2.89\ J

In this system as the potential and kinetic energy is conserved from work energy equivalence we get

W=P-K\\\Rightarrow W=2.89-3.3354\\\Rightarrow W=-0.4454\ J

The work done by friction is -0.4454 Joules

8 0
3 years ago
4.0km at 25 west of south, then 2.0km at 15 north east
Aliun [14]

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3 0
3 years ago
There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted s
Maslowich

Answer:

.a = 849.05 m / s²

Explanation

The centripetal acceleration is

            a = v² / r

     

Linear and angular velocity are related

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Angular velocity and frequency are related by

        w = 2π f

Let's replace

        a = w² r

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Let's reduce to the SI system

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Let's calculate

       a = 4π² 14.45²  0.103

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8 0
4 years ago
The table below shows the acceleration of gravity on different bodies in the
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Answer:

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