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3 years ago

Earth’s gravity keeps the moon in orbit by pulling on it.

Physics

2 answers:

MAXImum [283]3 years ago

5 0

Answer:

A. pulls back on the Earth, which is the main cause of the rise and fall of the ocean tides on Earth.

Mnenie [13.5K]3 years ago

3 0

Answer:B number right .

Explanation:

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Which is the force that slows moving things down?

BlackZzzverrR [31]

i think centripetal Force

7 0

3 years ago

Read 2 more answers

The weight of a body is 147N. what is its mass?

barxatty [35]

To find the mass, with only the weight:

⇒ must consider the relationship between the mass and weight

⇒ (in other words) we must find the equation that has both the

mass and weight

Based on our physics knowledge, we know:

$Weight=mass*gravitational_. acceleration$

Weight: 147N
Gravitational Acceleration: 9.8 m/s²

Now let's plug in the values, and solve:

$147N = mass*9.8_.m/s^2\\mass = 15_.kg$

Answer: 15 kg

Hope that helps!

*as a note, if you use the gravitational acceleration as 10m/s², then the answer would be 14.7 kg

5 0

1 year ago

Factors that affect the light intensity received from a source

Roman55 [17]

Light intensity and distance is interrelated. When the distance changes, the intensity of light changes. This relationship is called inverse-square relationship. The inverse-square relationship refers to the fact that when distance changes, light intensity also changes: inverse because when distance decreases, light density increases and when distance increases, the latter decreases; square refers to the fact that light intensity and distance is not a one-to-one relationship.

6 0

2 years ago

True or false when a person swims through water no work is done

ozzi

Answer:

False

Explanation:

First we need to know the definition of work.

Work is done when a body moves through a distance with an applied force.

When swimming in water, you exert a force while moving through a distance. Therefore, work is done!

8 0

3 years ago

Read 2 more answers

"A car is travelling at 70 m/s. The driver sees a cow in the road and slows down with a constant acceleration for 10 seconds bef

Veronika [31]

The question does not ask for anything in particular. I will calculate the acceleration and distance.

Answer:

The acceleration of the car is $-7\ m/s^2$

The distance traveled before stopping is 350 m

Explanation:

Constant Acceleration Motion

It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.

Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:

$v_f=v_o+at\qquad [1]$

The distance traveled by the object is given by:

$\displaystyle x=v_o.t+\frac{a.t^2}{2}\qquad [2]$

The car has an initial speed of v0=70 m/s when the driver sees a cow in the road and steps on the brakes with an (assumed) constant acceleration during t=10 seconds before stopping (vf=0).

With the information provided, we can calculate the value of the acceleration and the distance traveled.

Using the equation [1] we can solve for a:

$\displaystyle a=\frac{v_f-v_o}{t}$