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Step2247 [10]
3 years ago
9

From where does the penny that is launched into the air get its energy

Physics
1 answer:
ad-work [718]3 years ago
6 0
When the elastic potential energy in the ruler was released it gave energy to the coin thus launching into the air. The coin got its kinetic energy from the ruler
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Two girl scouts are sitting in a large canoe on a still lake while at summer camp. the canoe happens to be oriented with the fro
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That it's more puashe on the back of the canoe and that effects the back of the canoe to fall back
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3 years ago
Which type of energy do you always have at the top of the first hill on a roller coaster?​
Verdich [7]

Answer:

Potential Energy

8 0
3 years ago
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A 2.0 kg pendulum has an initial total energy of 20 J. Calculate the energy lost as heat if the pendulum is 0.10 m high and is t
Maurinko [17]

The correct answer is (A) 2.0 J

Total energy of the pendulum is the sum of its kinetic and potential energy. At the instant of time, when the pendulum is at a height <em>h</em> and has a speed <em>v, </em>Its energy is given by,

E=mgh+\frac{1}{2} mv^2

Substitute 2.0 kg for <em>m</em>, the mass of the pendulum, 9.81 m/s² for <em>g</em>, the acceleration due to gravity, 0.10 m for <em>h and 4.0 m/s for </em>v<em>.</em>

E=mgh+\frac{1}{2} mv^2\\ =(2.0kg)(9.81m/s^2)(0.10 m)+\frac{1}{2}(2.0kg)(4.0m/s)^2\\ =17.962J

The pendulum has an initial energy of 20 J. the energy lost is given by,

\Delta E=(20J)-(17.962J)\\ =2.038J=2.0J

Thus, the energy lost by the pendulum is (A) 2.0 J

4 0
2 years ago
Please help
Andre45 [30]

Answer:

your

answer is

12.004

7 0
3 years ago
A motorcycle has a speed of 30 m / s. After braking, it decelerates with constant deceleration A = -3.0 m / s ^ 2
marin [14]

a = \displaystyle\frac{v-u}{t}

-3 = \displaystyle\frac{v - 30}{3}

v -30 = -9

v = 21 m/s

4 0
3 years ago
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