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yawa3891 [41]
3 years ago
12

You are going sledding with your little cousins during a well-earned break. You push your 23 kg cousin so that they have a speed

of 6 m/s at the top of the hill that is 17 m tall. What is the kinetic energy of your cousin at the top of the hill (after you push)? (in J)
Physics
2 answers:
pogonyaev3 years ago
7 0

Answer:

kinetic energy = 414 J

Explanation:

given data

mass = 23 kg  

speed = 6 m/s  

height = 17 m    

to find out

kinetic energy

solution

we get kinetic energy that is express as

kinetic energy = 0.5 × m × v²    ..........................1

here m is mass and v is speed so

put here value we get kinetic energy

kinetic energy = 0.5 × 23 × 6²

kinetic energy = 414 J

Thepotemich [5.8K]3 years ago
5 0

Answer:

414 J

Explanation:

mass, m = 23 kg

velocity, v = 6 m/s

Kinetic energy is given by

K = 0.5 mv²

K = 0.5 x 23 x 6 x 6

K = 414 J

Thus, the kinetic energy is 414 J.

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The eagle drops the trout a height of 6.1 m the fish travels 7.9 m horizontaly before hitting the water what is the velocity of
Semenov [28]

The velocity of the eagle is 7.0 m/s

Explanation:

The motion of the fish is a projectile motion, which consists of two independent motions:

- A uniform motion (constant velocity) along the horizontal direction, where the horizontal velocity of the fish is equal to the horizontal velocity of the eagle

- An accelerated motion with constant acceleration (acceleration of gravity) in the vertical direction  

We start by analyzing the vertical motion, using the following suvat equation:

s=ut+\frac{1}{2}at^2

where:

s = 6.1 m is the vertical displacement of the fish

u = 0 is the initial vertical velocity of the fish

a=g=9.8 m/s^2 is the acceleration of gravity

t is the time

Solving for t, we find the time of flight of the fish:

t=\sqrt{\frac{2s}{a}}=\sqrt{\frac{2(6.1)}{9.8}}=1.12 s

Now we know that during this time, the fish travels a horizontal distance of

x = 7.9 m

Therefore, the horizontal velocity of the fish is

v_x = \frac{x}{t}=\frac{7.9}{1.12}=7.0 m/s

And therefore, this is the initial velocity of the eagle.

Learn more about projectile motion:

brainly.com/question/8751410

#LearnwithBrainly

6 0
3 years ago
What is the power of 4ohm resistor connected to a 12v battery?
NemiM [27]

Answer:

36watts

Explanation:

Data obtained from the question include:

R (Resistor) = 4 Ohms

V (Voltage) = 12V

P (power) =?

P = IV

Recall: I = V/R

P = V^2 /R

P = (12)^2 /4

P = 144/4

P = 36watts

Therefore, power is 36watts

8 0
3 years ago
Read 2 more answers
A stone was dropped off a cliff and hit the ground with a speed of 96 ft/s. What is the height of the cliff? (Use 32 ft/s2 for t
nadezda [96]
The initial velocity of the stone is 0 ft/s. Given the initial velocity (Vi), final velocity (Vf), and acceleration due to gravity (g), the distance may be calculated through the equation,
                                     d = ((Vf)² - (Vi)²) / 2g
Substituting the known values,
                                     d = ((96 ft/s)² - 0))/ (2x32.2)
The value of d is 143.10 ft. 
4 0
3 years ago
Explain why theories may be changed or replaced overnight time.
vlabodo [156]
They may be changed because they may find evidence of some thing that will change their perspective on things.
5 0
3 years ago
Are amplitude and wavelength related?<br> A: Yes<br> B: No
Trava [24]

The answer is A.Yes

Explanation:

The amplitude of a wave is the height of a wave as measured from the highest point of the wave to the lowest on the wave.

4 0
2 years ago
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