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pentagon [3]
3 years ago
11

Once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 J, and its potential

energy decreases to BLANK J.
A: 500
B: 900
C: 1,100
D: 2,000
Physics
2 answers:
Xelga [282]3 years ago
7 0

Answer:

2,000, 900, 2,000

Explanation:

Paladinen [302]3 years ago
5 0

Answer:

2000 For The First/900 For The Second/And 2000 For The Third/JUST TOOK QUIZ

Explanation:

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3 years ago
When you throw a pebble straight up with initial speed V, it reaches a maximum height H with no air resistance. At what speed sh
aev [14]

Answer:

Explanation:

Given

Initial speed is u=V

Maximum height of Pebble is H

Deriving maximum height of Pebble and considering motion in vertical direction

v^2-u^2=2 as

where v=final velocity

u=initial velocity

a=acceleration

s=Displacement

Final velocity will be zero at maximum height

0-(V)^2=2\times (-g)\cdot H

H=\frac{V^2}{2g}

i.e. maximum height is dependent on square of initial velocity

for twice the height

2H=\frac{(V')^2}{2g}

on comparing

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7 0
3 years ago
When observing a group of children at a daycare center, Emily made the following observations: Five year old children played in
konstantin123 [22]
This question is not about physics science.

The answer is: option <span>a. Five-year-old children have longer attention spans than three-year-old children.

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5 0
3 years ago
Read 2 more answers
Two bodies made of the same material have same external dimension and appearance, but one is compact solid and other is hollow.
Bumek [7]

Answer:

Different

Explanation:

The hollow one will expand even more making it have a larger volume then the solid one so they are different

5 0
3 years ago
Use the impulse-momentum theorem to find how long a stone falling straight down takes to increase its speed from 3.7 m/s to 9.90
11111nata11111 [884]
<h2>Time taken is 0.632 seconds</h2>

Explanation:

Impulse momentum theorem is change in momentum is impulse.

Change in momentum = Impulse

Final momentum - Initial momentum = Impulse

Mass x Final velocity - Mass x Initial Velocity = Force x Time

Mass x Final velocity - Mass x Initial Velocity =Mass x Acceleration x Time

Final velocity - Initial Velocity = Acceleration x Time

Final velocity = 9.9 m/s

Initial Velocity = 3.7 m/s

Acceleration = 9.81 m/s²

Substituting

9.9 - 3.7 = 9.81 x Time

Time = 0.632 seconds

Time taken is 0.632 seconds

8 0
3 years ago
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