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igor_vitrenko [27]

3 years ago

11

If velocity is positive, which woul

1 answer:

shusha [124]3 years ago

5 0

Answer:

C. An inital volocity that is faster than the final volocity

Explanation:

.

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What is the word for the horizontal distance a projectile travels

hjlf

• t2<span>). Furthermore, since there is no horizontal acceleration, the horizontal distance traveled by the projectile each second is a constant value - the projectile travels a horizontal distance of </span>20 meters<span> each second. This is consistent with the initial horizontal velocity of </span>20 m<span>/s.

</span>

7 0

4 years ago

Read 2 more answers

A crane lifts up two boxes.<br><br> Which free body diagram shows the forces acting on block A?

Temka [501]

Answer:

The 3rd graph

Explanation:

A free body diagram is a diagram which shows all the forces acting on an object.

The problem asks us to find the free body diagram of block A, so we must find all the forces acting on block A.

We have 3 forces acting on block A in total:

- The force of gravity (its weight), which pushes the block downward (in the diagram, it is the force represented with $F_{gA}$

- The tension in the rope 1, which pulls block A upwards: this force is represented with $F_{T1}$

- The tension in the rope 2, due to the weight of block 2, which pulls block A downwards: this force is represented with $F_{T2}$

Based on the direction of these 3 forces, the correct diagram is the 3rd one.

7 0

3 years ago

Read 2 more answers

A girl runs 40m due south in 40 seconds an d then 20m due north in 10 secondsCalculate.

m_a_m_a [10]

Answer:

Average speed = 1.2 m/s

Average velocity = 0.4 m/s

Explanation:

Average speed = total distance/total time

Average speed = (40 + 20)/(40 + 10)

Average speed = 60/50

Average speed = 1.2 m/s

Average velocity = displacement/time

Now, she ran 40 m south and ran 20 m back north which is in the direction of where she began the journey.

Thus;

Displacement = 40 - 20 = 20 m

Average velocity = 20/50 = 0.4 m/s

3 0

3 years ago

Find the frequency (in hertz) of the first overtone for a 1.75 m pipe that is closed at only one end. Use 350 m/s for the speed

serg [7]

Answer:

The first overtone frequency is 100 Hz.

Solution:

According to the question:

Length of pipe, l = 1.75 m

Speed of sound in air, v_{sa} = 350 m/s

Frequency of first overtone, $f_{1}$ is given by:

$f_{1} = \frac{v_{sa}}{2l}$

$f_{1} = \frac{350}{2\times 1.75} = 100 Hz$

Since, the frequency, as clear from the formula depends only on the speed

and the length. It is independent of the air temperature.

Thus there will be no effect of air temperature on the frequency.

7 0

3 years ago

Earthquakes are usually caused by tectonic plates slipping past each other. An earthquake generates seismic waves of energy that

lyudmila [28]

Answer:

I think a tsunami

Explanation:

im not 100% sure but that would make the most sense to me hope this helped!

6 0

4 years ago