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Mashutka [201]
4 years ago
10

Which statement best describes the difference between speed and velocity? A. Velocity is speed with a direction. B. Speed is vel

ocity with a direction. C. Velocity is acceleration with a direction. D. Velocity measures position, while speed does not.
Physics
2 answers:
tekilochka [14]4 years ago
6 0

Explanation:

The total distance travelled by an object divided by total time taken is called the speed of an object. Its formula is given by :

s=\dfrac{d}{t}

Speed is a scalar quantity. It has only magnitude but no direction.

The total displacement of the particle divided by total time taken is called the velocity of that object. It is given by :

v=\dfrac{D}{t}

D is the displacement or shortest path covered

Velocity is a vector quantity. It have both magnitude and direction.

Both speed and velocity of an object are same. The only difference is that the speed is a scalar quantity while the velocity is a vector.

The statement that best explains the difference between velocity and speed is (A) i.e. "Velocity is speed with a direction".

velikii [3]4 years ago
4 0
The answer is A. Velocity is speed with a direction
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3 years ago
An 888.0 kg elevator is moving downward with a velocity of 0.800 m/s. It decelerates uniformly and comes to a stop in a distance
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Answer:

The value of tension on the cable T = 1065.6 N

Explanation:

Mass = 888 kg

Initial velocity ( u )= 0.8 \frac{m}{sec}

Final velocity ( V ) = 0

Distance traveled before come to rest = 0.2667 m

Now use third law of motion V^{2} = u^{2} - 2 a s

Put all the values in above formula we get,

⇒ 0 = 0.8^{2} - 2 × a ×0.2667

⇒ a = 1.2 \frac{m}{sec^{2} }

This is the deceleration of the box.

Tension in the cable is given by T = F = m × a

Put all the values in above formula we get,

T = 888 × 1.2

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This is the value of tension on the cable.

5 0
3 years ago
In 1994, Leroy Burrell of the United States set what was then a new world record for the men’s 100 m run. He ran the 1.00  102
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Answer:

61.33 Kg

Explanation:

From the question given above, the following data were obtained:

Distance = 1×10² m

Time = 9.5 s

Kinetic energy (KE) = 3.40×10³ J

Mass (m) =?

Next, we shall determine the velocity Leroy Burrell. This can be obtained as follow:

Distance = 1×10² m

Time = 9.5 s

Velocity =?

Velocity = Distance / time

Velocity = 1×10² / 9.5

Velocity = 10.53 m/s

Finally, we shall determine the mass of Leroy Burrell. This can be obtained as follow:

Kinetic energy (KE) = 3.40×10³ J

Velocity (v) = 10.53 m/s

Mass (m) =?

KE = ½mv²

3.40×10³ = ½ × m × 10.53²

3.40×10³ = ½ × m × 110.8809

3.40×10³ = m × 55.44045

Divide both side by 55.44045

m = 3.40×10³ / 55.44045

m = 61.33 Kg

Thus, the mass of Leroy Burrell is 61.33 Kg

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