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3 years ago

PLS HELP, WILL GIVE BRAINLIEST

Physics

1 answer:

Alika [10]3 years ago

8 0

Answer:

I'm pretty sure its product.

Explanation:

Hope this helps and have a wonderful day!!!!

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A tennis ball of mass m=0.060 kg and speed v=25 m/s strikes a wall at a 45 angle and rebounds with the same velocity at 45°. Wha

Diano4ka-milaya [45]

To solve this problem we will apply the concepts related to the Impulse which can be defined as the product between mass and the total change in velocity. That is to say

$p = m\Delta v$

Here,

m = mass

$\Delta v =$ Change in velocity

As we can see there are two types of velocity at the moment the object makes the impact,

the first would be the initial velocity perpendicular to the wall and the final velocity perpendicular to the wall.

That is to say,

$v_i = vcos\theta$

$v_f = -v sin\theta$

El angulo dado es de 45° y la velocidad de 25, por tanto

$v_i = (25)cos(45) = 17.68m/s$

$v_f = -(25)sin(45) = -17.68m/s$

The change of sign indicates a change in the direction of the object.

Therefore the impulse would be as

$p = 0.060(-17.68-17.68)$

$p = -2.12kg \cdot m/s$

The negative sign indicates that the pulse is in the opposite direction of the initial velocity.

3 0

3 years ago

A car of mass 2400kg accelerates from 10m/s to 30m/s if the force is 12000N what is the distance

leonid [27]

Explanation:

Initial velocity (u) = 10 m/s
Final velocity (v) = 30 m/s
Mass (m) = 2400 kg
Force (F) = 12000 N

Let us find the time taken first.

→ F = ma

Acceleration (a) = (v – u)/t

→ 12000 = 2400 × (30 – 10)/t

→ 12000 ÷ 2400 = (20)/t

→ 5 = 20/t

→ 5t = 20

→ t = 20 ÷ 5

→ t = 4 seconds

Now, find the acceleration.

→ a = (v – u)/t

→ a = (30 – 10)/4

→ a = 20/4

→ a = 5 m/s²

Now, by using the third equation of motion,

→ v² – u² = 2as

s = distance

→ (30)² – (10)² = 2 × 5 × s

→ 900 – 100 = 10s

→ 800 = 10s

→ 800 ÷ 10 = s

→ 80 m = s

Therefore, distance travelled is 80 m.

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3 years ago

How is the earth a cracked hard boiled egg

leva [86]

Good question because although this earth going through hell the earth will never break because its solid
Tbh I don’t know how earth is still put together after so much effect

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3 years ago

Which statement describes the vector plotted below?

inessss [21]

The vector goes from (0,0) to (-5, -5) .C

<h3>How to describe the vector</h3>

From the given graph, trace the point of the arrow.

For y-axis, the arrow is at -5 point

For x-axis, the arrow is at -5 point

The start point of the arrow is at 0 both on the x and y axes.

Thus, the vector goes from the point at (0, 0) and (-5, -5) on the x and y axes respectively.

Learn more about vectors here:

brainly.com/question/3184914

#SPJ1

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2 years ago

Your grandfather clock's pendulum has a length of 0.9930 m.

posledela

We will start from the period definition to find the relationship between the perioricity and the length. After finding the relationship between the two lengths and periods we will proceed to calculate the length two with the loss of the period, that is

$T = 2\pi \sqrt{\frac{l}{g}}$

Therefore the period is proportional to the square root of the length

$T \propto l^{1/2}$

Then

$\frac{T_2}{T_1} = \frac{\sqrt{L_2}}{\sqrt{L_1}}$

$(\frac{T_2}{T_1})^2 = \frac{L_2}{L_1}$

$L_2 = (\frac{T_2}{T_1})^2(L_1)$

The period $T_1$ is equivalent to the seconds that a day has, that is 86400 seconds while period two will be the seconds that have one day less the loss of 16 consecutive announced in the statement therefore,