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lyudmila [28]
3 years ago
11

Assume the following vehicle are all moving at the same speed.it would be harder to change the velocity of which vehicle.a.bicyc

le.B.car.c.motorcycle.D.semi-tractor trailer.
Physics
1 answer:
Anuta_ua [19.1K]3 years ago
6 0

Answer:im just guessing d but i think its d though

Explanation:

it pretty obvious

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Use Newton's laws to explain why a falling object dropped from a 57m tower accelerates initially but then reaches constant veloc
snow_lady [41]

Answer:

At the point of dropping the object, by Newton's first law due to gravitational force F_g = m × g, accelerates

By Newton's Second law the object reaches impacts on the air with the gravitational force resulting in changing momentum of m×(Final Velocity - Initial Velocity)

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The body then moves at a constant uniform motion down according to Newton's first law

Explanation:

At the point the object of mass, m, is dropped from the height of the tower, the only force acting on the object is the gravitational force such that the object has an acceleration which is the acceleration due to gravity, g, and the gravitational force is therefore = m × g

As the speed of the object increases while the object is falling with the gravitational acceleration the rate at which the object cuts through layers of air which (by Newton's first law of motion, are at rest ) has some buoyancy effect also increases therefore, the object is constantly increasingly changing the momentum of the air which by Newton's second law results, at an high enough velocity, and by Newton's third law, in a force equal to the applied gravitational force

Therefore, the force of the air drag becomes equal to the gravitational force, cancelling each other out and the object then moves according to Newton;s first law, in uniform motion of a constant speed while still falling down.

5 0
3 years ago
What angle will give you the maximum range (horizontal displacementon a projectile? ( 3 pts)
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Answer:

45 degrees

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The textbooks say that the maximum range for projectile motion (with no air resistance) is 45 degrees.

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6 0
3 years ago
Read 2 more answers
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