Can someone tell me the answer to this?

An astronaut holds a rock 100m above the surface of Planet X . The rock is then thrown upward with a speed of 15m/s , as shown i

Butoxors [25]

Answer: $5 m/s^{2}$

Explanation:

The described situation is is related to vertical motion (and free fall). So, we can use the following equation that models what happens with this rock:

$y=y_{o}+V_{o}sin\theta t-\frac{1}{2}gt^{2}$ (1)

Where:

$y=0m$ is the rock's final height

$y_{o}=100 m$ is the rock's initial height

$V_{o}=15 m/s$ is the rock's initial velocity

$\theta=90\°$ is the angle at which the rock was thrown (directly upwards)

$t=10 s$ is the time

$g$ is the acceleration due gravity in Planet X

Then, isolating $g$ and taking into account $sin(90\°)=1$ :

$g=(-\frac{2}{t^{2}})(y-y_{o}-V_{o}t)$ (2)

$g=(-\frac{2}{(10 s)^{2}})(0 m-100 m-(15 m/s)(10 s))$ (3)

Finally:

$g=5 m/s^{2}$ (4) This is the acceleration due gravity in Planet X

7 0

3 years ago

I NEED HELP ASAP DUE IN 30 MINUTES!!!

Softa [21]

Answer:

Explanation:It is commonly judged by how a vehicle performs particularly during cornering, acceleration, and braking as well as on the vehicle's directional stability when ...

6 0

3 years ago

Read 2 more answers

Part a a calorimeter consists of an aluminum cup inside of an insulated container. The cup is weighed on a top-loading balance a

vovikov84 [41]

The change in heat q for the aluminum cup is 141 J.

<h3>What is Specific heat?</h3>

A substance's heat capacity is the amount of heat needed to increase its overall temperature by one degree. The heat capacity is known as the specific heat capacity or the specific heat if the substance's mass is unity.

change in heat -

The amount of heat Q that is transported to create a temperature shift depends on the substance and phase involved, the mass of the system, and the magnitude of the temperature change. (A) The temperature change and the amount of heat transported are directly inversely related.

The answer's sign dig is determined by a calculation's lowest sign digits.

The solution will need 3 digits because the temperatures are provided with 3 significant digits and the specified heat has 3 significant digits (the mass has 4 significant digits).

31.91 g * 0.903 J/g-C * (26.1 - 21.2 C) = 141 J

to learn more about Specific Heat go to - brainly.com/question/21406849

#SPJ4

5 0

2 years ago

Some cities now implement signal lights designed to specifically apply to _____ rather than motorized vehicles.

dimulka [17.4K]

The correct answer is C; Bicycles.

Further Explanation:

In major cities, in the United States, have implemented signal lights specifically designed for bicycle riders. The riders also have their own designated bike lanes in many large cities. Drivers in vehicles, are to give the right of way to people on bicycles.

Bicycle riders are to follow the same laws and laws specifically for the riders or they can face fines and tickets.

Learn more about bicycle laws at brainly.com/question/8934107

#LearnwithBrainly

7 0

3 years ago

Mass m = 0.1 kg moves to the right with speed v = 0.31 m/s and collides with an equal mass initially at rest. After this inelast

nataly862011 [7]

Answer:

VR = 0.26 m/s

Explanation:

m = 0.1 kg M = 0.1 kg

v = 0.31 m/s Vi = 0 m/s

the kinetic energy of the system initially is:

Ki = 1/2×m×(v^2) + 1/2×M×(Vi)^2

= 1/2×(0.1)×(0.31)^2

= 4.805×10^-3 J

then, we told that the system after collision only retains a fraction 0.69 of its initial kinetic energy. that is the final kinetic energy of the system is:

Kf = 0.69×4.805×10^-3 J

= 3.31545×10^-3 J

but due equal masses of the bodies, we know that after the collision the only body that would be in motion would be the body that at res and the body that was initially moving will now be at rest.so the kinetic energy is only made by the second body and given by:

Kf = 1/2×M×(VR)^2

3.31545×10^-3 = 1/2×(0.1)×(VR)^2

VR^2 = 0.066309

VR = 0.26 m/s

according to the coservation of linear momentum:

6 0

4 years ago