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kupik [55]
3 years ago
12

If the velocity of a car is 45 km/h west, how far can it travel in 0.5 hours?

Physics
2 answers:
Anarel [89]3 years ago
6 0
45km/h * 0.5h= 22.5km

The car can travel 22.5km in 0.5 hours
Dominik [7]3 years ago
6 0

(45 km/hour west) · (0.5 hour) =

(45 · 0.5) · (km · hour west/hour) =

22.5 km west

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Explanation:

6 0
3 years ago
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dmitriy555 [2]

Answer:

The moment is -78.4 N-m (clockwise).

Explanation:

Given:

Mass of the object (m) = 20 kg

Distance of the object from the knee joint (d) = 0.4 m

Weight of leg is not considered.

Acceleration due to gravity (g) = 9.8 m/s²

Now, weight of the object is equal to the product of its mass and acceleration due to gravity. So,

Weight = Mass × Acceleration due to gravity

            = mg=20\times 9.8 =196\ N

We know that, moment of a force about a point is defined as the product of force applied and the perpendicular distance between the point and the line of application of force.

Moment of the given weight about the knee joint is given as:

Moment about knee joint = Weight × Distance from knee joint to weight

Moment about knee joint = 196 × 0.4 = 78.4 Nm

Now, from the diagram below, we can observe that, the weight acts vertically down and thus the sense of rotation about the knee joint at point O is clockwise. So, moment is negative.

Therefore, the moment is -78.4 N-m (clockwise).

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Answer:

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17. a sea breeze is a breeze blowing towards the land
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frozen [14]

Answer:

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So, the change in the momentum of the object is mv-mu.

Hence, the change in the momentum of the object is 60 kg m/s.

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