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4 years ago

Which of the following has a greater gravitational pull on the Earth?

Physics

2 answers:

cestrela7 [59]4 years ago

7 0

Answer:

1000 kilogram hippopotamus

Explanation:

The more massive an object, the more gravitational pull there is. Because of Newton's third law, the hippo also has an opposite gravitational pull on the earth.

defon4 years ago

5 0

Answer: 1000 kilogram hippopotamus

Explanation: The gravitational "pull" or gravitational force can be written as:

F = G*m1*m2/r^2

Where G is a positive constant, called the "gravitational constant"

m1 and m2 are the masses of the objects, and r is the distance between the objects.

Now, you can see that the gravitational force grows with the mass of the objects, so objects with bigger mass will experience bigger forces, then, the option that has a greater gravitational pull on Earth is the option with bigger mass, in this case, the 1000kg hippopotamus.

Now, this gravitational force is what we call "weight", and is kinda easy to see that the animal that weights more in all the options is the 1000kg hippopotamus

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Alinara [238K]

I think it’s the third one, if not it’s the first.

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3 years ago

A meterstick is initially standing vertically on the floor. If the meterstick falls over, with what angular velocity will it hit

notsponge [240]

L = length of the meter stick = 1 m

h = height of center of mass of stick from bottom end on the floor = L/2 = 1/2 = 0.5 m

m = mass of the meter stick

I = moment of inertia of the meter stick about the bottom end

w = angular velocity as it hits the floor

moment of inertia of the meter stick about the bottom end is given as

I = m L²/3

using conservation of energy

rotational kinetic energy of meter stick as it hits the floor = potential energy when it is vertical

(0.5) I w² = m g h

(0.5) (m L²/3) w² = m g h

( L²) w² = 6g h

( 1²) w² = 6 (9.8) (0.5)

w = 5.4 rad/s

8 0

4 years ago

A projectile is launched with an initial velocity 60m/s at an angle 60° to the vertical. What the magnitude of it's displacement

emmasim [6.3K]

Answer:

the magnitude of the displacement after 5s is 137.31 m.

Explanation:

Given;

initial velocity of the projectile, u = 60 m/s

angle of projection, θ = 60°

time of motion, t = 5s

the vertical component of the velocity, $u_y= u\ sin \theta = 60sin(60^0)$

The magnitude of the displacement after 5s is calculated as;

$h = u_yt -\frac{1}{2} gt^2\\\\h = 60sin (60^0)\times 5 - \frac{1}{2} (9.8)(5)^2\\\\h = 259.81-122.5\\\\h = 137.31 \ m$

Therefore, the magnitude of the displacement after 5s is 137.31 m.

3 0

3 years ago

What is the heat needed to raise the temperature of 24.7 kg silver from 14.0 degrees celsius to 30.0 degrees celsius? specific h

Citrus2011 [14]

The amount of heat needed to increase the temperature of a substance by $\Delta T$ is given by
$Q=m C_s \Delta T$
where
m is the mass of the substance
$C_s$ is its specific heat capacity
$\Delta T$ is the increase of temperature

The sample of silver of our problem has a mass of $m=24.7 kg$ . Its specific heat capacity is $C_s = 236 J/g^{\circ}C$ and the increase in temperature is
$\Delta T=30.0^{\circ}-14.0^{\circ}C=16.0^{\circ}C$

Therefore, the amount of heat needed is
$Q=mC_s \Delta T=(24.7 kg)(236 J/g^{\circ}C)(16.0^{\circ}C)=9.32 \cdot 10^4 J$

8 0

4 years ago

Which object will experience the greatest acceleration ?

tekilochka [14]

Answer:

Y will experience the most acceleration

Explanation:

Because using F=ma, you can rearrange the formula to show that acceleration equals force over mass. You then do the calculations for each of the objects, and y will be your answer.

5 0

3 years ago

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