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3 years ago

The force of gravity on Mercury is less than the Earth because:

2 answers:

8 0

The answer is B.

Earth's mass is 5.972 × 10^24 kg
Mercury's mass is 3.285 × 10^23 kg

Hope i helped

Vinvika [58]3 years ago

7 0

Mercury has less mass than earth. So the answer is B

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What is equivalent to 21/12

Harrizon [31]

21/12 is equal to 1 3/4 hope this helps!

7 0

3 years ago

Read 2 more answers

The free length of the spring that is attached to the 0.3-lb slider is 3 in. If the slider is released from rest when x = 6 in.,

hichkok12 [17]

Answer:

a = 64 ft / s²

Explanation:

The force in a spring is given by Hooke's law

F = -k x

Let's use the initial data to calculate the spring constant

k = F / x

Reduscate to the English system

x = 3 in (1foot/12 in) =0.25 foot

k = 0.3 / 0.25

k = 1.2 lb / foot

Now we can use Newton's second law

F = ma

a = F / m

a = -k x / m

m = w / g

m = 0.3 / 32 = 0.009375

x= 6 in (1foot /12 in)= 0.5 foot

a = - 1.2 0.5 / 0.009375

a = 64 ft / s²

5 0

3 years ago

A car advertisement states that a car can accelerate at 2 m/sec. The car starts from rest and accelerates to 70 km/hr. How much

Reptile [31]

Answer:

9.72s

Explanation:

$\pink{\frak{Given}}\begin{cases}\textsf{ A car starts from rest.}\\\textsf{It has an acceleration of 2m/s$^2$.}\\\textsf{ The final velocity of the car is 70km/hr.}\end{cases}$

Here we need to find out the time that the car took to achieve the velocity of 70km/hr after starting from rest . Firstly convert the final velocity in m/s by multiplying it by 5/18 , as ,

$\longrightarrow\sf 70km/hr = 70 \times \dfrac{5}{18} m/s =\bf 19.44\ m/s$

As we know that the rate of change of velocity is known as acceleration , so ;

$\longrightarrow\sf a =\dfrac{v - u}{t}$

Plug in the respective values ,

$\longrightarrow\sf 2m/s^2 = \dfrac{ 19.4 m/s -0m/s}{t} \\$

Simplify ,

$\longrightarrow\sf 2m/s^2 =\dfrac{19.4m/s}{t}$

Cross multiply ,

$\longrightarrow\sf t = \dfrac{19.44m/s}{2m/s^2}$

Simplify

$\longrightarrow\sf \boxed{\bf t = 9.72 s}$

<h3>Hence the required answer is 9.72s.</h3>

7 0

2 years ago

At summer camp, the swimming course runs the length (L) of a small lake. To determine the length of the course, the camp counsel

Oduvanchick [21]

Answer:

The length of the swimming course is 47.16 meters.

Explanation:

It is given that the right triangle overlaps the lake and hypotenuse L runs through the length of the lake. Thus length of the lake will be the length of this hypotenuse.

The instructors have conducted measurements of the right triangle and has found the legs to be 25 and 40 meters. The sum of squares of base and height of a right triangle gives the value of its hypotenuse according to Pythagoras theorem.

Thus $h^2+b^2=H^2$