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SSSSS [86.1K]
3 years ago
8

Determine the velocity of a car that travels 28km in 2.2 hours

Physics
1 answer:
OLga [1]3 years ago
5 0

Answer:

<h2>velocity = 12.73 km/hr.</h2><h2 />

Explanation:

velocity = distance / time

              =<u> 28 km </u>

                  2.2 hr

               = 12.73 km/hr.

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What does the power of a machine measure?
GarryVolchara [31]

The power of a machine is the work/time ratio for that particular machine

Its the rate of doing work.

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2 years ago
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The law of universal gravitation (gravity) describes two factors that affect the force of gravity between objects. What two fact
kykrilka [37]
The force depends on the mass of both objects and the distance between them

F = G*m1*m2/r^2

So the force has a linear connection with the mass of both objects and a quadratic connection with the distance between the center of masses
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2 years ago
The acceleration due to gravity is lower on the Moon than on Earth. Which of the following is true about the mass and weight of
Naya [18.7K]

Mass is the same, weight is less

<h3>What is the Weight and mass on Moon ?</h3>

As we know that the mass of the object is the measurement of the quantity of the matter that is present in it

So here we can say that if the mass of the object is m then its total quantity of the matter that is present in it is given as

mass = (density) × (volume)

Now for the weight of the object is defined as the force of gravity due to planet

Fg = mg

so the weight of the object is depending on the acceleration due to gravity of the planet

As we know that the gravity of moon is smaller than the gravity of the earth so here weight on the moon will be smaller than the weight on the Earth

Learn more about Weight on Moon here:

brainly.com/question/4080619

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3 0
2 years ago
HELP PLS .. The half-life of potassium-44 is 22 minutes. It decays into calcium-44. After
Ber [7]

Answer:

1/4

Explanation:

3 0
2 years ago
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In 8.5 s a fisherman winds 2.4 m of fishing line onto a reel whose radius is 3.0 cm (assumed to be constant as an approximation)
SSSSS [86.1K]

Answer:

9.412 rad/s.

Explanation:

Velocity is the rate of change of an object's position.

V = x/t

Where x is the distance in m

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t is time taken in s

= 8.5 s

V = 2.4/8.5

= 0.2824 m/s.

Equating linear velocity and angular velocity,

V = ω*r

Where,

ω Is the angular speed in rad/s

r is the radius of the circle in m

= 3 cm

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ω = V/r

= 0.2824/0.03

= 9.412 rad/s.

4 0
3 years ago
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