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marusya05 [52]
3 years ago
8

If a stone with an original velocity of zero is falling from a ledge and takes eight seconds that it the ground what is the fina

l velocity at the stone
Physics
1 answer:
Natalka [10]3 years ago
6 0

Answer: 78.4 m/s

The formula for speed using known acceleration:

v=at+v_0=gt+v_0

where the initial velocity v0 = 0 in this case, g is the gravitational acceleration and t is given to be 8 seconds, so:

v = 9.8  \frac{m}{s^2}\cdot 8 s=78.4 \frac{m}{s}

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A ball dropped onto a trampoline returns to the same height after the rebound.
Jet001 [13]

a)The ball's potential energy changes as it moves from the release point to the top of the rebound.

b)The ball's potential energy is at its highest and rests when it is in the top position.

<h3>What is potential energy?</h3>

The potential energy is due to the virtue of the position and the height. The unit for the potential energy is the joule.

The potential energy is mainly dependent upon the height of the object.

Potential energy = mgh

The kinetic energy of the body is due to the virtue of motion.

According to the Law of Conservation of Energy, energy can neither be created nor destroyed but can be transferred from one form to another.

The total energy is the sum of all the energies present in the system. The potential energy in a system is due to its position in the system.

A ball dropped onto a trampoline returns to the same height after the rebound.

Hence, the ball's potential energy changes as it moves from the release point to the top of the rebound. When the ball is at the top position the potential energy is maximum and the ball is at rest.

To learn more about the potential energy, refer to the link;

brainly.com/question/24284560

#SPJ1

7 0
2 years ago
Convert:<br> 1) 2kg into gram<br> 2) 5200m into km<br> 3) 20cm into m
aivan3 [116]
1) 2 kilograms converted into grams is 2000

2) 5200 meters converted into kilometers is 5.2

3) 20 centimeters converted into meters is 0.2
8 0
3 years ago
Which one of the following statements accurately describes a characteristic of adolescence?
Yuliya22 [10]

Hi!


Answer D would be the best option.


During the period of adolescence, which is generally between 13-19, the individual goes through a transitional period which is characterized by changes in emotional, physical and mental capacities.

These changes consequently result in the adolescents' desire to be more independent, and to govern their lives as how they deem more fitting, which results in the rebellious nature in the individual.

The other options include characteristics that MAY be seen in individuals, but is not a defining characteristic of adolescence and is not very common.


Hope this helps.

7 0
3 years ago
Determine the centripetal force on a vehicle rounding a circular curve with a radius of 80 m at a constant speed of 90 km/h if t
quester [9]
Mass of the vehicle = 2000 kg
Velocity of the vehicle = 90 km/hr
                                   = 25 m/s
Radius of the curve = 80 m
Then
Centripetal force = [2000 * (25)^2]/80
                            = (2000 * 625)/80
                            = 15625 kg m/s
                            = 15625 Newton second
I hope that this is the answer that you were looking for and the answer has come to your desired help. 
3 0
3 years ago
A golfer tees off and hits a golf ball at a speed of 31 m/s and at an angle of 35 degrees. What is the horizontal velocity compo
nasty-shy [4]
The horizontal component of the velocity of the ball is calculated by multiplying the speed by the cosine of the given angle. 
                        x-component of speed = (31 m/s)(cos 35°) 
                                                               = 25.39 m/s
Thus, the horizontal velocity component of the ball is 25.39 m/s. 
7 0
3 years ago
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