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3 years ago

Which statement about two objects having the same momentum is true?

Physics

1 answer:

Reil [10]3 years ago

7 0

Answer:

The product of mass X velocity is the same for both

Explanation:

The momentum of a body is the product of its mass and velocity.

Momentum = mass x velocity

Two objects having equal momentum will have the same for the product of their mass and velocity.

It is amount of motion a body can produce.

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Gravitational force is affected by: a. mass c. distance b. weight d. both a and c

NikAS [45]

Gravitational force is affected by: a. mass c. distance b. weight d. both a and c

Mass.

When an object is above the Earth's surface it hasgravitational potential energy (GPE). The amount of GPE an object has depends on its mass and its height above the Earth's surface

6 0

3 years ago

Which statement best explains why a wet saw used to cut through a fine optical crystals is constantly lubricated with oil

daser333 [38]

The major reason why a wet saw that is used in cutting optical crystals is constantly lubricated with oil is largely due to friction, lubrication decreases friction and minimises the increase of internal energy.

Friction is basically the coming together of two parts that rubs against each other, it causes heat and lead to deterioration of surfaces, it can also lead to wear and tear.

Although, despite it down side, friction is desire-able in most applications

e.g the brake system of vehicles, and if not for friction, we humans cannot walk without falling

learn more:

brainly.com/question/24338873

5 0

2 years ago

What is the Force of Gravity of a 40 kg object on Earth?

AVprozaik [17]

Gravity on Earth pulls objects to the center of the Earth about 9.8 meters per second per second. The child's mass on the moon or at a space station is 40 kg. The child's weight at these places changes because gravity is different at these locations.

7 0

2 years ago

Which is true concerning the acceleration due to gravity? A. It decreases with increasing altitude. B. It is different for diffe

Kisachek [45]

Answer:

The correct answer is option 'a': It decreases with increase in altitude

Explanation:

Acceleration due to gravity is the acceleration that a body is subjected to when it is freely dropped from a height from surface of any planet, ignoring the resistance that the object may face in it's motion such as drag due to any fluid.. The acceleration due to gravity is same for all the objects and is independent of their masses, it only depends on the mass of the planet and the radius of the planet on which the object is dropped. it's values varies with:

1) Depth from surface of planet.

2)Height from surface of planet.

3) Latitude of the object.

Hence it neither is a fundamental quantity nor an universal constant.

The variation of acceleration due to gravity with height can be mathematically written as:

$g(h)=g_{surface}(1-\frac{2h}{R_{planet}})$

where,

R is the radius of the planet

$g_{surface}$ is value of acceleration due to gravity at surface.

hence we can see that upon increase in altitude the value of 'g' goes on decreasing.

5 0

3 years ago

An 10 kg mass has an applied force of magnitude 69N acting on it pushing it to move in the positive x-direction. The mass is on

Oduvanchick [21]

The net force on the mass in the vertical direction is

∑ F = n - w = 0

and the net horizontal force is

∑ F = A - f = ma

where

n = magnitude of the normal force

w = mg = weight of the mass

m = 10 kg, mass of the … uh, mass

g = 9.8 m/s², mag. of acceleration due to gravity

A = 69 N, mag. of the applied force

f = mag. of kinetic friction

From the first equation, we get

n = mg = (10 kg) (9.8 m/s²) = 98 N

Then the friction force has magnitude

f = µ n = 0.5 (98 N) = 49 N

Solve the mass's acceleration in the second equation:

69 N - 49 N = (10 kg) a

a = (20 N) / (10 kg) = 2.0 m/s²

in the positive x direction.

5 0

2 years ago