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oksano4ka [1.4K]
3 years ago
11

According to newton’s first law of motion, it is true that an object moving at a constant speed in a straight path will continue

to do so until a net force acts upon it.
a. True
b. False
Physics
2 answers:
sergiy2304 [10]3 years ago
6 0
In Newton's First Law of Motion, it is stated : 
"an object in motion will stay in motion and in the same direction until acted upon by an opposing force."
It is also applied to objects NOT in motion :
"An object at rest will stay at rest until acted upon by an unbalanced force."
Your question asks if "According to newton's first law of motion, it is true that an object moving at a constant speed in a straight path will continue to do so until a net force acts upon it. True or false?"
This is true.
I hope this helps!
Anastasy [175]3 years ago
5 0
The answer is A. True
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If the loop the car is currently on has a radius of 26.0 m , find the minimum height h so that the car will not fall off the tra
ki77a [65]

The minimum height h is 65m so that the car will not fall off the track at the top of the circular part of the loop.

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

Potential energy plus kinetic energy are combined to form mechanical energy. According to the principle of mechanical energy conservation, mechanical energy is constant in an isolated system when only conservative forces are acting on it. Potential energy increases when an object moves in the opposite direction of a conservative net force. Kinetic energy also changes as an object's speed, not velocity, changes. However, nonconservative forces, such as frictional forces, will always be present in real systems; however, if these forces are of minimal magnitude, mechanical energy changes little, making the idea of its conservation a reasonable approximation.

For completing the vertical circle the minimum speed at the bottom must be \sqrt{5gR}

so conserving mechanical energy

mgh=\frac{1}{2} m (v_{bottom})^{2}

gh=\frac{1}{2} 5gR

⇒ h= \frac{5}{2} \times 26

h = 65m

To learn more about mechanical energy, visit:

brainly.com/question/24443465

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1 year ago
5. Granny Goodwitch boards a bus at the local shopping center. The bus travels an
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As BBC ztrrtv B 4 C w.a)z
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2 years ago
A 1.8 kg uniform rod with a length of 90 cm is attached at one end to a frictionless pivot. It is free to rotate about the pivot
Leokris [45]

Answer:

a. 32.67 rad/s²  b. 29.4 m/s²

Explanation:

a. The initial angular acceleration of the rod

Since torque τ = Iα = WL (since the weight of the rod W is the only force acting on the rod , so it gives it a torque, τ at distance L from the pivot )where I = rotational inertia of uniform rod about pivot = mL²/3 (moment of inertia about an axis through one end of the rod), α = initial angular acceleration, W = weight of rod = mg where m = mass of rod = 1.8 kg and g = acceleration due to gravity = 9.8 m/s² and L = length of rod = 90 cm = 0.9 m.

So, Iα = WL

mL²α/3 = mgL

dividing through by mL, we have

Lα/3 = g

multiplying both sides by 3, we have

Lα = 3g

dividing both sides by L, we have

α = 3g/L

Substituting the values of the variables, we have

α = 3g/L

= 3 × 9.8 m/s²/0.9 m

= 29.4/0.9 rad/s²

= 32.67 rad/s²

b. The initial linear acceleration of the right end of the rod?

The linear acceleration at the initial point is tangential, so a = Lα = 0.9 m × 32.67 rad/s² = 29.4 m/s²

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Benny has 20 jellybeans and wants to share with his friends how many will each friend get? there are 5 friends.
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Explanation:

devide 20/6 and 20/5 respectively.

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The force of gravity acting on an object is the object's ______. A. acceleration B. mass C. weight D. matter
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Answer:

d

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