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enyata [817]
3 years ago
5

A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. what is the lizard average acceleration

Physics
1 answer:
VLD [36.1K]3 years ago
8 0

Acceleration = (change in speed) / (time for the change)

change in speed = (ending speed) - (starting speed)

change in speed = (10 m/s) - (2 m/s)  =  8 m/s

Acceleration = (8 m/s) / (4 sec)

Acceleration = (8/4) (m/s²)

<em>Acceleration = 2 m/s²</em>

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A pelican flying along a horizontal path drops a fish from a height of 5.4 m. The fish travels 8.0 m horizontally before it hits
Schach [20]

Answer:

a) V = 6.25 m/s

b) d = 4.6 m

Explanation:

a) <u>The pelican's initial speed is equal to the horizontal speed of the fish</u>. So we can calculate Vx of the fish knowing the fact that it travelled 8.0 m, using the formula for an <em>Uniformly Accelerated Motion</em> (because the fish is freefalling) to calculate the time the fish was falling:

D(t) = 0.5*a*t² + V₀*t + e₀

In this case, V₀ and e₀ are zero, a is gravity's acceleration and D(t) is 8.0 m

8.0 m = 0.5 * 9.81m/s² * t²

t² = 1.63 s²

t = 1.28 s

Thus Vx of the fish is:

8.0 m / 1.28 s = 6.25 m/s

<u>And that's the same initial speed of the pelican.</u>

b) The pelican is traveling at the same speed, so Vx of the fish remains the same, 6.25 m/s. First we calculate the time again:

D(t) = 0.5*a*t²

2.7 m = 0.5 * 9.81m/s² * t²

t² = 0.55 s²

t = 0.74 s

Now we use the formula V = d/t and solve for t:

6.25 m/s = d / 0.74 s

d = 4.6m

6 0
3 years ago
Which of the following did Christian Doppler explain? A. Atmospheric changes that affect climate B. The transfer of electricity
Nataly [62]
C is the best answer 
5 0
3 years ago
Read 2 more answers
HELP PLS i need this right now
N76 [4]

Answer:

V = 44.4 units.

Explanation:

In order to solve this problem, we must use the Pythagorean theorem. Which is defined by the following expression.

V = \sqrt{(V_{x})^{2} +(V_{y})^{2} }

where:

Vx = - 43 units

Vy = 11.1 units

Now replacing:

V=\sqrt{(-43)^{2} +(11.1)^{2} }\\V=44.4 units

7 0
4 years ago
Which radiation has a higher frequency than visible light
Bogdan [553]
Infrared radiation<span> lies between the </span>visible<span> and microwave portions of the electromagnetic spectrum. Infrared waves have wavelengths longer </span>than visible<span> and shorter </span>than<span> microwaves, and have </span>frequencies<span> which are lower </span>than visible<span> and </span>higher than<span> microwaves.</span>
6 0
3 years ago
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Bumper car A (281 kg) moving +2.82 m/s makes an elastic collision with bumper car B (209 kg) moving -1.72 m/s. What is the veloc
Nuetrik [128]

The velocity of B after elastic collision is 3.45m/s

This type of collision is an elastic collision and we can use a formula to solve this problem.

<h3>Elastic Collision</h3>

v_2 = \frac{2m_1u_1}{m_1+m_2} - \frac{m_1 - m_2}{m_1 + m_2}u_2

The data given are;

  • m1 = 281kg
  • u1 = 2.82m/s
  • m2 = 209kg
  • u2 = -1.72m/s
  • v1 = ?

Let's substitute the values into the equation.

v_1 = \frac{2*281*2.82}{281+209} -\frac{281-209}{281+209}(-1.72)\\v_1 = 3.45m/s

From the calculation above, the final velocity of the car B after elastic collision is 3.45m/s.

Learn more about elastic collision here;

brainly.com/question/7694106

4 0
2 years ago
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