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lapo4ka [179]
3 years ago
13

A steel rope is used to lift a 26 kg slab of concrete from the ground to a height of 20 m. Assume that the rope moves the concre

te at a constant speed and then stops once the slab is at the final position above the ground. How much work does the steel rope do on the slab of concrete?
Physics
1 answer:
Ne4ueva [31]3 years ago
5 0

Answer:

5200 Joules

Explanation:

Work Formula:

W = F . D

W = (26.10) . 20

W = 260 . 20

W = 5200 Joules

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Measurement conversions [metric to metric] 568 cm = m​
Trava [24]

Answer:

5.68 meters

Explanation:

hope this helps!

7 0
3 years ago
Why is the sky blue and doesn't change color
Softa [21]

The statement is <u>false</u> because the sky <u>can change </u>colors during sunsets, sun rises, etc. The sky is not always blue.

7 0
3 years ago
A metallic wire has a diameter of 4.12mm. when the current in the wire is 8.00a, the drift velocity is 5.40×10−5m/s.
Darina [25.2K]
R = 2.06 mm = 2.06 x 10^(-3) m
Q = 1.6 x 10^(-19) C
v = 2.5 x 10^(-5) m/s
I = 8 A = 8 C/s
A = r² π = ( 2.06 x 10^(-3) ) ² x 3.14 = 13.325 x 10^(-6 ) m² =
= 1.3325 x 10^(-5) m²
I = n Q v A
n = I / (Q v A)
n = 8 C/s / ( 1.6 x 10 ^(-19) * 5.4 x 10^(-5) * 1.3325 x 10^(-5) ) = 
= 0.694 x 10^(29) m^(-3)
n = 6.94  x 10^(28)   m^(-3)
8 0
3 years ago
Read 2 more answers
if a 60 kg person was standing on a platform at the surface of saturn and they jumped, they would have to push with a force grea
lidiya [134]

Answer:

A 60 kg person standing on a platform at the surface of Saturn and they jumped, they would have to push with a force greater than 540 N

Explanation:

The gravitational attraction between an object on the surface of a planet and the planet is given by the weight of the object

Therefore the force needed to be applied for an object to lift off the surface of a planet = The weight of the object

The weight of the object on the surface of a planet = m × g

Where;

m = The mass of the object

g = The strength of gravity on the planet's surface in N/kg

The given parameters are;

The mass of the person standing on a platform at the surface of Saturn, m = 60 kg

The strength of gravity on the surface of Saturn = 9 N/kg

Therefore, we have;

The weight of the person = The force greater than which the person would have to push on the surface of Saturn so as to Jump = The weight of the person on the surface of Saturn = 60 kg × 9 N/kg = 540 N

Therefore, for a 60 kg person standing on a platform at the surface of Saturn and they jumped, they would have to push with a force greater than 540 N.

4 0
3 years ago
A car is traveling west for 12 s its speed is 36.12 m/s in the same direction find the total distance the car traveled
ki77a [65]

<u>We are given:</u>

constant speed of the car (u) = 36.12 m/s

time in question (t) = 12 seconds

<u>Solving for the Distance and Displacement:</u>

from the second equation of motion:

s = ut + 1/2 at^2

since we have 0 acceleration:

s = ut

<em>replacing the variables</em>

s = 36.12 * 12

s = 433.44 m

Since the car is travelling in a straight line towards the same direction, it's Distance will be equal to its Displacement

Hence, both the Displacement and <u>Distance covered by the car is </u>

<u>433.44 m</u>

but since Displacement also has a direction vector along with it,

the <u>Displacement will be  433.44 m due west</u>

4 0
2 years ago
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