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Arisa [49]
3 years ago
7

Which example possesses mechanical potential energy?. A. a taut guitar string. B. an oscillating pendulum. C. a roller coaster r

ide. D. a child on a swing. E. a speeding car
Physics
2 answers:
Andrej [43]3 years ago
6 0
<span>
The taut guitar string haspotencial energy which we can see in action.</span>  <span>· so option a is correct.</span>
777dan777 [17]3 years ago
5 0

a taut guitar string

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Stephanie goes on a giraffe safari in Africa. She travels 8 km north, then 3 km west and then 2 km south.
pashok25 [27]

Answer:

distance =13km , displacement=3km

Explanation:

north south does not affect displacement

5 0
3 years ago
if a 5-kg bowling ball is projected upward witha velocity of 2.0 m/s, then what is the recoil velocity of the Earth(mass=6.0×10^
vitfil [10]

by the concept of momentum conservation we can say

if net force on a system of mass is ZERO then its momentum will remain conserved

Here a ball is projected upwards so if we take Ball + Earth as a system then total momentum of the system will remain conserved

Initially when ball is on the surface of earth the system has zero momentum and hence we can say after throwing the ball momentum of earth + ball must be zero

now using same equation we can say

P_{ball} + P_{earth} = 0

m_1v_1 + m_2v_2= 0

given that

m_1 = 5 kg

v_1 = 2 m/s

m_2 = 6 * 10^{24} kg

from above equation velocity of earth will be

v_2 = \frac{m_1 v_1}{m_2}

v_2 = \frac{5*2}{6 * 10^{24}}

v_2 = 1.67 * 10^{-24} m/s

so above will be the recoil speed of earth

3 0
3 years ago
an unknown charge exerts an attractive force of 4.23 E 13 N. If these charges are separated by 8cm, what is the magnitude of the
mash [69]

Answer:

Since there is attraction force between two charges so the other charge must be - 3C

Explanation:

As we know that the force between two charges is given by formula

F = \frac{kq_1q_2}{r^2}

here we know that

F = 4.23 \times 10^{13}N

also we know that

q_1 = 10C

r = 8 cm

now we have

4.23 \times 10^{13} = \frac{(9\times 10^9)(10)q}{0.08^2}

so we have

q = -3C

7 0
3 years ago
A driver drives a car up a hill. The driver keeps pressing the gas so that the engine increases the force it applies to the car.
iris [78.8K]

Answer:

because it's on an upward climb therefore newton's law of motion is in place and you're car is pulled by gravity

6 0
3 years ago
Why do astronauts float aboard the international space station?
lianna [129]
They’re falling toward earth & moving forward at about the same velocity. because the downward and forward forces are nearly equal, the astronauts are not pulled in any specific direction, so they float . <span>
</span>
8 0
3 years ago
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