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Vikentia [17]
3 years ago
11

In one half hour, a car traveled 35km. What was the speed of the car?

Physics
1 answer:
Vladimir79 [104]3 years ago
8 0

Answer:

70km/h

Explanation:

speed  = distance /time

            = 35/0.5

           =70km/h

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When a wire is made thicker its resistance what?
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Making a wire thicker has the same effect as making a road wider. It makes it easier for the electron traffic to flow. The resistance decreases, and the current (traffic) increases.
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What is law of conservation of momentum ?​
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Physics double pivot question​
andriy [413]

Explanation:

Assuming the wall is frictionless, there are four forces acting on the ladder.

Weight pulling down at the center of the ladder (mg).

Reaction force pushing to the left at the wall (Rw).

Reaction force pushing up at the foot of the ladder (Rf).

Friction force pushing to the right at the foot of the ladder (Ff).

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∑τ = Iα

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Rw (3.0 sin 60°) = mg (1.5 cos 60°)

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(b) State the friction at the foot of the ladder.

Take the sum of the forces in the x direction.

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Ff = Rw

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(c) State the reaction at the foot of the ladder.

Take the sum of the forces in the y direction.

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3 0
3 years ago
A car moves with a speed 72km/h, the driver uses the brakes, the car stops after 8 seconds, calculate its speed after 10 seconds
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The acceleration of the car is solved by subtracting the initial speed from the final speed then dividing the result by the elapsed time.

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acceleration = - 20m/s / 5 s

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8 0
3 years ago
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Answer:

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