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Alex787 [66]
2 years ago
15

Consider a series of motion scenarios. Each scenario is accompanied by a short description and an arrow indicating the instantan

eous velocity. Assume that air resistance is negligible in every scenario. The only forces present in each scenario are gravity, surface (or normal) forces, and friction if indicated. Place the appropriate arrow, or zero, next to each scenario to indicate the direction of the net force acting on the block.

Physics
1 answer:
anygoal [31]2 years ago
7 0

The resultant force is obtained by taking into account the magnitude and direction of all the forces involved.

<h3>What is motion?</h3>

Motion refers to change in position with respect to time. The instantaneous velocity is the velocity at a given time during motion.

Since force is a vector quantity, we must note that the net force will point in a given direction after taken all other forces into account. The net/resultant force is the force tat will have the same effect in magnitude and direction as all the forces taken together.

Learn  more about resultant force: brainly.com/question/7041906

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A rotating wheel requires 3.05-s to rotate through 37.0 revolutions. Its angular speed at the end of the 3.05-s interval is 97.9
Setler79 [48]

Answer:

\alpha=14.2rad/s^2

Explanation:

The formula that relates angular displacement with angular acceleration is:

\Delta \theta=\omega_i t+\frac{\alpha t^2}{2}

We can obtain \omega_i from the definition of angular acceleration:

\alpha=\frac{\Delta \omega}{\Delta t}=\frac{\omega_f-\omega_i}{t}

\omega_i=\omega_f-\alpha t

Putting all together:

\Delta \theta=(\omega_f-\alpha t) t+\frac{\alpha t^2}{2}=\omega_f t-\frac{\alpha t^2}{2}

Which, since we want the angular acceleration, is:

\alpha=\frac{2(\omega_f t-\Delta \theta)}{t^2}

And for our values is:

\alpha=\frac{2((97.9rad/s)(3.05s)-(37(2\pi rad)))}{(3.05s)^2}=14.2rad/s^2

5 0
3 years ago
What concept should be used to determine the answer to the following: At what distance downstream will the boat reach the opposi
Kipish [7]
Vector resolution will be used to answer this question as the boat's velocity will have two components, one allowing it to travel across the river and the other taking it downstream.
5 0
4 years ago
A car uses ____________________________ to move. Select one: a. energy b. pulls c. motion d. work
Fynjy0 [20]

Answer:

Option A.

Explanation:

The correct answer is Option A.

The car uses energy to move.

A car is a machine that converts energy locked in fuel like petrol or diesel and turn it into mechanical energy.

The energy produced from the combustion of gasoline is then used to move the shaft, which sends the power to the rear axle and the wheel starts to move.

4 0
4 years ago
Describe what would happen if you rubbed a mineral with a Mohs hardness value of 7 against a mineral with a value of 5?
chubhunter [2.5K]
The mineral with Mohs hardness would be scratched because the mineral with Mohs 7 hardness is stronger than the Mohs 5 mineral. Eventually, that mineral would turn into dust if you kept rubbing it.
8 0
3 years ago
Choose the word that BEST completes the following sentence. Saturn’s rings have been assigned a letter, based on their location.
puteri [66]

Answer:

The correct answer would be Saturn's Cassini Division.

Explanation:

Read about it here.

https://caps.gsfc.nasa.gov/simpson/kingswood/rings/

Hope this helps! :)

5 0
3 years ago
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