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torisob [31]
3 years ago
8

Jake's toy car is sitting on a smooth, flat surface. This wheel and axle simple machine will remain in the same place because th

e ________ force prevents the car from rolling away on its own.
Physics
1 answer:
weeeeeb [17]3 years ago
8 0

Answer:

Inertial

Explanation:

By the Newton's first law of motion every body continues to be in the state of rest or in uniform motion until an external force is applied to it.

Here the car sits on a friction-less surface so no force of friction will act on it and the wheels will continue to rotate irrespective of the position of the car.

The toy car will continue to be in the same place until and external force acts on it and causes acceleration in it.

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The mass of the sun is 1.99x10^30 kg . Jupiter is 7.79x10^8 km away from the sun and the mass of 1.90x10^27 kg
maks197457 [2]

Question is missing:

"What is the gravitational force between the Sun and Jupiter?"

Answer:

4.16\cdot 10^{23} N

Explanation:

The gravitational force between two objects is given by

F=G\frac{m_1m_2}{r^2}

where

G=6.67\cdot 10^{-11} m^3 kg^{-1} s^{-2} is the gravitational constant

m1, m2 are the masses of the two objects

r is the separation between the objects

In this problem, we have

m_1 = 1.99\cdot 10^{30} kg is the mass of the sun

m_2 = 1.90\cdot 10^{27} kg is the mass of Jupiter

r=7.79\cdot 10^8 km = 7.79\cdot 10^{11} m is their separation

Solving the equation, we find

F=(6.67\cdot 10^{-11})\frac{(1.99\cdot 10^{30})(1.90\cdot 10^{27})}{(7.79\cdot 10^{11})^2}=4.16\cdot 10^{23} N

6 0
3 years ago
a police officer finds 60 m of skid marks at the scene of a car crash. Assuming a uniform deceleration of 7.5 m/s to a stop , wh
Oliga [24]
The equation to be used is for the rectilinear motion at constant acceleration:

x = v₀t + 0.5at²
a = (v-v₀)/t
where
x is distance
v and v₀ is the final and initial velocity
t is time
a is acceleration

Because the acceleration is decelerating, that would be reported as -7.5 m/s². Substituting,

-7.5 = (0 - v₀)/t
v₀ = 7.5 t --> eqn 1

x = v₀t + 0.5at²
60 = (7.5t)(t) + 0.5(-7.5)(t²)
Solving for t,
t = 4s

Thus,
v₀ = 7.5 m/s² * 4s
v₀ = 30 m/s
6 0
3 years ago
What is the voltage measured with a voltmeter across a wire in a circuit?
Law Incorporation [45]
<h3><u>Answer;</u></h3>

<em>The voltage is zero</em>

<h3><u>Explanation;</u></h3>
  • <em><u>Voltage is the potential difference between two points in a circuit or the electromotive force in a given circuit and is expressed in volts (V). </u></em>
  • Voltage is measured by a device called voltmeter that is always connected in parallel with the current source.
  • <em><u>When voltage is measured between two points on a wire in a circuit with zero or no resistance in between the two points then the voltage will be zero</u></em><em>. </em>From the ohm's Law, voltage is given the product of resistance and current and thus if the resistance is zero then the voltage will be zero.

6 0
3 years ago
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Explain why wedges and screws are actually types of inclined planes.
slava [35]
<span>The screw is really just an inclined plane covered around with a tiny pole. The wedge is definitely an inclined plane, since it starts with a point, then rises getting thicker, as an inclined plane. </span>
5 0
3 years ago
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How does the law of conservation of energy relate to the system shown in this model
egoroff_w [7]

Answer: The law of conservation of energy is a physical law that states energy cannot be created or destroyed but may be changed from one form to another. Another way of stating this law of chemistry is to say the total energy of an isolated system.

Explanation:

3 0
3 years ago
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