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3 years ago

The motion of an object parallel to the earth's surface is

Physics

1 answer:

AnnyKZ [126]3 years ago

8 0

<span>LAWS OF MOTION:

The motion of an object parallel to the earth's surface is: Horizontal </span>

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There is strong evidence that Europa, a satellite of Jupiter, has a liquid ocean beneath its icy surface. Many scientists think

dangina [55]

Answer:

4.44 rpm

Explanation:

$\omega$ = Angular speed

G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²

r = Radius of Europa = $\frac{3138000}{2}\ m$

R = Radius of arm = 6 m

The acceleration due to gravity is given by

$g=\frac{GM}{r^2}\\\Rightarrow g=\frac{6.67\times 10^{-11}\times 4.8\times 10^{22}}{\left(\frac{3138000}{2}\right)^2}\\\Rightarrow g=1.3\ m/s^2$

Here the centripetal acceleration of the arm and acceleration due to gravity are equal

$a_c=\omega^2R$

$a_c=g\\\Rightarrow \omega^2R=1.3\\\Rightarrow \omega^2\times 6=1.3\\\Rightarrow \omega=\sqrt{\frac{1.3}{6}}\\\Rightarrow \omega=0.46547\ rad/s$

Converting to rpm

$1\ rad/s=\frac{60}{2\pi}\ rpm$

$0.46547\ rad/s=0.46547\times \frac{60}{2\pi}\ rpm=4.44\ rpm$

The angular speed of the arm is 4.44 rpm

8 0

3 years ago

Determine the amount of torque

malfutka [58]

Answer:

250Nm

Explanation:

Given parameters:

Length of the long pry bar = 1m

Force acting on it = 250N

Angle = 90°

Unknown:

Amount of torque applied = ?

Solution:

Torque is the turning force on a body that causes the rotation of the body.

The formula is given as:

Torque = Force x r Sin Ф

r is the distance

So;

Torque = 250 x 1 x sin 90 = 250Nm

7 0

3 years ago

When you view the pendulum’s swing, it shows that at the very top of the swing KE = 0. What does that tell you about the pendulu

nadezda [96]

it tells you that it has a lot of force

5 0

3 years ago

Read 2 more answers

(I will give brainliest whoever helps me !!)

lorasvet [3.4K]

C. Forces have mass and take up space

3 0

3 years ago

What do you measure when you measure an object’s mass?

Effectus [21]

Answer:

how much space it takes up in the world

Explanation:

1) Mass is a measurement of the amount of matter something contains, while Weight is the measurement of the pull of gravity on an object. 2) Mass is measured by using a balance comparing a known amount of matter to an unknown amount of matter. Weight is measured on a scale.

3 0

3 years ago