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3 years ago

If a machine exerts 12000 J of work with800 N of force the distance it covered was

Physics

1 answer:

sergiy2304 [10]3 years ago

5 0

Answer:

Explanation:

The distance covered can be found by using the formula

$d = \frac{w}{f} \\$

f is the force

w is the workdone

From the question we have

$a = \frac{12000}{800} = \frac{120}{8} \\$

We have the final answer as

Hope this helps you

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A cannon fires a shell straight upward; 1.8 s after it is launched, the shell is moving upward with a speed of 17 m/s. Assuming

goblinko [34]

To solve this problem we will apply the concepts of acceleration according to the laws of kinetics. Acceleration can be defined as the change in velocity per unit time, that is,

$a = \frac{v-u}{t}$

Here,

v = Final velocity

u = Initial velocity

t = Time

Rearranging to find the initial velocity,

$u = v-at$

Now the acceleration is equal to the gravity, then,

$u = v+gt$

$u = 17+(9.8)(1.8)$

$u = 34.64m/s$

The velocity of the shell at 5.5s after the launch is,

$v = u+at$

$v = u-gt$

$v = 34.64-(9.8)(5.5)$

$v = -19.26m/s$

Therefore the magnitude of the velocity of the shell at 5.5s is -19.26m/s

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3 years ago

An Olympic runner complete the 200 m sprint and 23 seconds. What is the runners average speed (round your answer to the nearest

kipiarov [429]

Should be 8.7 m/s. Just divide 200 by 23 and round from there.

3 0

3 years ago

Satellite A is orbiting Earth at an altitude of 500 km and Satellite B is orbiting 800 km above the surface . How does the veloc

sp2606 [1]

The velocity of Satellite A is 2% greater than velocity of satellite B.

The given parameters;

<em>Altitude of Satellite A = 500 km</em>
<em>Altitude of Satellite B = 800 km</em>

The forces acting on the Satellites are given as follows;

$F_c = \frac{mv^2}{r} \\\\F_g = \frac{GMm}{r^2} \\\\\frac{v^2}{r} = \frac{GM}{r^2}\\\\v^2 = \frac{GM}{r} \\\\v^2 r = GM\\\\v_1^2 r _1 = v_2^2 r_2\\\\v_A^2r_A = v_B^2 r_B\\\\(\frac{v_A}{v_B} )^2 = \frac{r_B}{r_A} \\\\\frac{v_A}{v_B} = \sqrt{\frac{r_B}{r_A} } \\\\\frac{v_A}{v_B} = \sqrt{\frac{(800,000\ + \ 6.4 \times 10^6}{(500,000\ + \ 6.4 \times 10^6} )} \\\\\frac{v_A}{v_B} = 1.02 \\\\v_A = 1.02 \ v_B$

$v_A = v_B( 100\% \ + 2\%)\\\\v_A = 100\%v_B \ + \ \ 2\% v_B\\\\v_A = v_B \ \ + \ 2\% v_B$

Thus, the velocity of Satellite A is 2% greater than velocity of satellite B.

Learn more about velocity of satellite here: brainly.com/question/13981089

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3 years ago

The ___ spectrum contains photons of all energies.

Morgarella [4.7K]

Answer:

This is the electromagnetic spectrum.

Explanation:

The electromagnetic spectrum is the range of frequencies of electromagnetic radiation and their respective wavelengths and photon energies. Hope this helps have a great day!

3 0

3 years ago

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A car starts from rest at a stop light and reaches 20m/s in 3.5s. Determine the acceleration of the car

olga55 [171]

The car accelerated at around ~5.7 m/s

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3 years ago