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Triss [41]
2 years ago
8

Pam, with a mass of 40.4 kilograms, straps on a rocket pack while wearing her roller blades. The rocket supplies a constant forc

e for 26.7 meters, and Pam acquires a speed of 26.0 meters per second. a. What is Pam's final kinetic energy
Physics
1 answer:
barxatty [35]2 years ago
4 0

Answer:

13.66 kJ

Explanation:

Given that

Mass of Pam, m = 40.4 kg

Distance moved by the force, d = 26.7 m

Speed attained by Pam, v = 26 m/s

The kinetic energy is given by the formula, K.E = 1/2 mv², where

K.E = the needed kinetic energy

m = mass of the object(Pam)

v = velocity of the object(Pam)

Applying the formula, we have

K.E = 1/2 * 40.4 * 26²

K.E = 20.2 * 676

K.E = 13655.2 J

The Kinetic Energy is 13.66 kJ

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Two objects are in freefall. Object A experiences a gravitational force of
Vlad1618 [11]

<u>Answer:</u>

Both the objects A and B will have the same acceleration.

<u>Explanation :</u>

The objects will have the same acceleration as both are under free fall condition. When objects are under the free fall condition, the only force that acts on the object is its weight.

Weight is the force acting on a body of some mass, and the formula for finding the weight of a body is- Weight = mass × acceleration due to gravity(g).

Therefore, here the different weight is due to the difference masses of both bodies, and not due to the different acceleration values.

3 0
3 years ago
How long does it take for the hubble telescope to orbit earth
il63 [147K]

Answer:

95 minutes

Explanation:

According to N.A.S.A, the Hubble Space Telescope makes one orbit around Earth every 95 minutes.

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Hubble takes sharp pictures of objects in the sky such as planets, stars and galaxies. Hubble has made more than one million observations. These include detailed pictures of the birth and death of stars, galaxies billions of light years away, and comet pieces crashing into Jupiter's atmosphere.

Scientists have learned a lot about the universe from these pictures. Many of them are beautiful to look at."

3 0
3 years ago
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What is the SI units of mass and weight?
enot [183]
SI unit for mas is Kg and the SI unit of weight N for newton
8 0
3 years ago
Read 2 more answers
What step precedes the onset of hydrogen fusion in a star?
defon
The first step Hydrogen fusion process a nucleus of Deuterium (2H)is formed for two protons with the emission of an antielectron and neutronic.
University of Oregon.
6 0
2 years ago
The cable of a crane is lifting a 750 kg girder. The girder increases its speed from 0.25 m/s to 0.75 m/s in a distance of 3.5 m
IgorC [24]

To solve this exercise it is necessary to apply the equations concerning Work, both by general definition and by conservation of energy.

In other words, the work done by an object due to gravity is the equivalent to that defined by the potential energy equations, that is

W= mg\Delta h

Where,

m=mass

g=gravitational acceleration

\Delta h = Change in height

On the other hand we have that the work done by tension is defined by the conservation of kinetic and potential energy, that is to say

W= \Delta KE + \Delta PE

Where,

\Delta KE = Change in Kinetic Energy

\Delta PE =Change in Potential Energy

PART A) As defined by the work done by gravity would be given by,

W = mg\Delta h

W = (750)(9.8)(3.5)

W = 25.725kJ

Therefore the work done by gravity is 25.725kJ

PART B) The work done by the tension applies the energy conservation equation, that is to say

W= \Delta KE + \Delta PE

W = (\frac{1}{2}mv_f^2-\frac{1}{2}mv_i^2)+(mgh_f-mgh_i)

W = \frac{1}{2}m(v_f^2-v_i^2)+mg(h_f-h_i)

Replacing with our values,

W = \frac{1}{2}(750)(0.75^2-0.25^2)+(750)(9.8)(3.5)

W = 25.912kJ

Therefore the work done by tension is 25.9kJ

5 0
3 years ago
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