All categories

3 years ago

A dog of mass 4 kg runs up a hill of height 8 m. How much gravitational potential energy does the dog gain?

2 answers:

8 0

A. 314 because when you use the formula for the GPE ; GPE=MGH or means mass times gravity time height (4x8x9.8) and thats equivalent to 313.6 which rounds up to 314. Hope it helps

Scrat [10]3 years ago

6 0

Answer:

The gravitational potential energy is 314 J.

(A) is correct option.

Explanation:

Given that,

Mass of dog = 4 kg

Height = 8 m

We need to calculate the potential energy

Using formula of potential energy

$P.E = mgh$

m = mass

g = acceleration due to gravity

h = height

Put the value into the formula

$P.E=4\times9.8\times8$

$P.E=313.6=314\ J$

Hence, The gravitational potential energy is 314 J.

You might be interested in

Whitch group of elaments shares charicteristics whith both nonmetals and metloids

fgiga [73]

Answer metalloids hope this helps

4 0

3 years ago

Evaluate the final kinetic energy of the supply spacecraft for the actual tractor beam force, F(x)=αx3+β .

Tanzania [10]

Answer:

7.5 × 10^9 J.

Explanation:

So, we are given the following data or parameters or information for the proper solving of the question above;

=> ''actual force exerted by the tractor beam as a function of position is given by F(x) = ax + , where a = 6.1 x 10 N/mº and B = -4.1 x 10° N''

=> " Assume the supply spacecraft had an initial kinetic energy of KE = 2.7 x 10" J "

=> "that the tractor beam force is applied on the spacecraft over a distance of 7.5 x 10^11 m away.from its beginning position at = 0.0 m"

So, we can then solve it as;

KE2 – KE1 = F(x) dr.

KE2 - 2.7 x 10^11 J = - 3.5 × 10^6 × 7.5 x 10^4.

KE2 = 7.5 × 10^9 J.

3 0

3 years ago

Read 2 more answers

It is observed that the number of asteroids (or meteoroids) of a given diameter is roughly inversely proportional to the square

MaRussiya [10]

Answer:

(a) M = =1.57 *10²¹kg

(b) M = =1.57 *10²⁰kg

(d) M = =1.57 *10¹⁸kg

Explanation:

(a) For 1000km body, diameter D = 1000km = 1,000,000 m

and N = (1000/D)² = (1000/1000km)² = 1

substituting into the formula, we have

M = 1 * 4/3 π*3000*[1000000/2]³

=1.57 *10²¹kg

(b) For 100km body, diameter D = 100km = 100,000 m

and N = (1000/D)² = (1000/100km)² = 100

substituting into the formula, we have

M = 1 * 4/3 π*3000*[100000/2]³

=1.57 *10²⁰kg

and N = (1000/D)² = (1000/10km)² = 100

substituting into the formula, we have

M = 1 * 4/3 π*3000*[10000/2]³

=1.57 *10¹⁹kg

and N = (1000/D)² = (1000/1km)² = 100

substituting into the formula, we have

M = 1 * 4/3 π*3000*[1000/2]³

=1.57 *10¹⁸kg

4 0

2 years ago

Plate tectonics is unique to which terrestrial planet?

Furkat [3]

Answer: [B]: Earth .
_____________________________________________________

6 0

2 years ago

Read 2 more answers

Explain how Rutherfords' gold foil experiment explains how this experiment confirms the nuclear model of the atom and the idea t

alekssr [168]

Explanation:

When Rutherford did the Gold Foil experiment, he expected that most of his alpha particles will go straight through, without any major deflections. He noticed that, during the experiment, most alpha particles went straight through, but was surprised to see that some got deflected by major angles. So he came up with a theory which states that every atom has got a nucleus, and also stated that most parts of the atom are empty, as most of the particles went through.

6 0

3 years ago