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3 years ago

Definition of Newton’s first law of motion

2 answers:

3 0

Newton's first law of motion - sometimes referred to as the law of inertia. Newton's first law of motion is often stated as. An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Elanso [62]3 years ago

3 0

Explanation:

Newton first law state that an object will remain at rest or inform of motion In a straight line unless acted upon by an external force

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Explain the difference between how intrusive and extrusive igneous rock form and how those formation processes affect the minera

rusak2 [61]

Extrusive molten rocks are formed from lava while the intrusive molten rocks are formed from magma.

<u>Explanation:</u>

Extrusive molten rocks originate from lava, framing at the outside of the Earth and cooling rapidly, which means they structure little precious stones. Intrusive volcanic rocks originate from magma, shaping profound underground and taking more time to cool, which means they structure bigger crystals.

Intrusive molten rocks are framed when magma cools gradually underneath the surface, while extrusive rocks are shaped when magma cools quickly at the surface.

6 0

4 years ago

1.) if the total momentum for a system is the same before and after the collision, we say that momentum is conserved. if momentu

gogolik [260]

From the law of the conservation of energy; the ratio of the total kinetic energy after the collision to the total kinetic energy before the collision must be 1.

<h3>What is momentum?</h3>

The term momentum is the product of mass and velocity. The principle of conservation of linear momentum states that total momentum before collision must be the same as the total momentum after collision thus the ratio of the total momentum after the collision to the total momentum before the collision must be 1.

Also, from the law of the conservation of energy; the ratio of the total kinetic energy after the collision to the total kinetic energy before the collision must be 1.

Learn more about momentum:brainly.com/question/24030570

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6 0

2 years ago

In which of the following situations is the Doppler effect absent?

Bumek [7]

The source and the observer are moving towards each other. The observer is moving toward the source. The source is moving away from the observer

4 0

3 years ago

A snowboarder starts from rest on an inclined planar snow surface and gives herself a tiny push to start sliding down the hill.

tiny-mole [99]

Answer:

v = 26.52 m/s

Explanation:

Here we know that as she passes the flag she will gain some speed

so here we can say that

Work done by all forces = change in kinetic energy of the system

so we will have

$W_g + W_f = \frac{1}{2}mv_f^2 - \frac{1}{2}mv_i^2$

here we know that

$W_g = mgh$

$W_f = -\mu mg d$

$v_i = 0$

h = 39.78 m

d = 27.81 m

so we have

$mgh - \mu mg d = \frac{1}{2}mv^2 - 0$

$(9.8)(39.78 - (0.14)(27.81)) = \frac{1}{2} v^2$

$v = 26.52 m/s$

8 0

3 years ago

A vehicle starts from rest and accelerates uniformly for 12 seconds to a

xz_007 [3.2K]

The value of the acceleration is 0.76 m/s² and the total time taken by the vehicle is 39 seconds.

<h3>Acceleration of the vehicle</h3>

The acceleration of the vehicle before coming to rest is calculated as follows;

v² = u² + 2as

where;

v is the final velocity
u is the initial velocity
a is the acceleration
s is the distance traveled before stopping

the car came to rest with constant velocity attained after 12 seconds.

the initial velocity of the car before 12 seconds is zero.

v² = 0 + 2as

a = v²/2s

a = (10²)/(2 x 66)

a = 0.76 m/s²

<h3>Time of motion of the vehicle</h3>

d = ut + ¹/₂at²

where;

d is the total distance traveled
t is the time of motion
a is acceleration
u is initial velocity of the vehicle

580 = 0 + ¹/₂(0.76)t²

580 = 0.38t²

t² = 580/0.38

t² = 1,526.3

t = √1,526.3

t = 39 seconds

Thus, the value of the acceleration is 0.76 m/s² and the total time taken by the vehicle is 39 seconds.

Learn more about time of motion here: brainly.com/question/2364404

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5 0

2 years ago