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2 years ago

I WILL GIVE BRAINLIEST!!!!

Physics

2 answers:

MAVERICK [17]2 years ago

6 0

Answer:

His machine must increase

Explanation:

Dmitriy789 [7]2 years ago

4 0

The Answer Is B his machine emus increase. It must increase because he is decreasing force in order to decrease force the distance need to increase! Hope this helps

Explanation:

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How to find a planet’s gravitational field strength using its radius?

grin007 [14]

The gravitational field strength is approximately equal to 10 N.

<u>Explanation:</u>

Gravitational field strength is the measure of gravitational force acting on any object placed on the surface of the planet. Generally, the mass of the object is considered as 1 kg.

So the gravitational field strength will be equal to the gravitational force acting on the object.

The formula for gravitational field strength is

$g = \frac{F}{m}$

Here g is the gravitational field strength, m is the mass of the object placed on the surface and F is the gravitational force acting on the object.

Since, the mass of any object placed on the surface of earth will be negligible compared to the mass of Earth, so the mass of the object is considered as 1 kg.

Then the g = F

And $F =\frac{GMm}{r^{2} }$

Here G is the gravitational constant, M is the mass of Earth and m is the mass of the object placed on the surface, while r is the radius of the Earth.

$g = F = \frac{6 \times 10^{24} \times 6.67 \times 10^{-11} \times 1}{(6.6 \times 10^{6}) ^{2} }$

$g = 0.977 \times 10^1= 9.77\ N$

So, the gravitational field strength is approximately equal to 10 N.

5 0

2 years ago

PLEASE HELP MEEEEEE!!!!!!!!!!!!!!!!!!

Simora [160]

You would need to freeze it in a freezer. Hope this helps if it does could I have brainlist thanks

5 0

2 years ago

Read 2 more answers

A student falls off a cliff into the lake 54.0 m below. What is the final velocity of the student?

Vladimir79 [104]

Answer:

$v_{y}$ = -32.53 m / s

this velocity is directed downwards

Explanation:

This is a free fall exercise, let's use the expression

$v_{y}^{2}$ = v_{oy}^{2} + 2 g (y -yo)

where we are assuming that there is friction with the air, as the body falls its initial velocity is zero

v_{oy} = √ 2g (y - y₀)

let's calculate

v_{y} = √ (2 9.8 (0-54.0))

$v_{y}$ = -32.53 m / s

this velocity is directed downwards

6 0

3 years ago

HELP ME PLS!!!!

alexgriva [62]

Answer:

C. An ion with a +2 charge

Explanation:

I guess

8 0

2 years ago

Read 2 more answers

If an object is propelled upward from a height of 128 feet at an initial velocity of 112 feet per second, then its height h aft

Marina CMI [18]

Explanation:

The equation of motion of an object is given by :

$h(t)=-16t^2+112t+128$

Where

t is the time in seconds

We need to find the time when the object hits the ground. When the object hits the ground, h(t) = 0

So,

$-16t^2+112t+128=0$

$-t^2+7t+8=0$

On solving above equation using online calculator, t = 8 seconds. So, the object hit the ground after 8 seconds. Hence, this is the required solution.

8 0

2 years ago