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Lubov Fominskaja [6]
3 years ago
15

A car that experiences no frictional force is started and caused to move. For the car to continue in that motion, the gas pedal

would have to be used:
Physics
1 answer:
astraxan [27]3 years ago
8 0

Explanation:

Gas pedal is not required to used on friction less surface. On a friction less surface once the car is started and caused to move, car continues to move with same velocity as there is no opposing force. Therefore, no pressing of gas pedal required. However, this situation is not possible in real life, as friction is always present.

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Aude slipped on ice going 7.6 m/s .What was her velocity before she hit the wal?
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Answer:

Define universal gravitational constant. Why is newton's law of gravitation called universal law?

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A 3.42 kg steel ball strikes a massive wall at 14.3 m/s at an angle of α = 61.5° with respect to the plane of the wall. It bounc
iren [92.7K]

The magnitude of the average force exerted on the ball by the wall is 225.469 N.

<h3>What is impulse?</h3>

The change in momentum is equal to the product of impact force applied while colliding and time for that impact.

Impulse F. t = m (Vf -Vi)

where, Vf is the final velocity and Vi is the initial velocity.

Given is a 3.42 kg steel ball strikes a massive wall at 14.3 m/s at an angle of α = 61.5° with respect to the plane of the wall. It bounces off with the same speed and angle. The ball is in contact with the wall for 0.207 s

Substitute the values into the expression, we get

Impulse = 2 x mvcosθ

Impulse= 2 x 3.42 x 14.3 x cos 61.5°

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F.t = I

Put the given values, we have

F = 46.672 /  0.207

F = 225.469 N

Thus, the magnitude of force exerted by the wall is 225.469 N

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4 0
2 years ago
Which of the following statements are true? Check all that apply.
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We have 6 levels and we will verify which of them is true.

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According to the properties of charges, the opposite charges attract each other and similar charges repel each other

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<em>C) Two positive charges attract each other.</em>

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<em>F) A neutral object contains no charge.</em>

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3 years ago
How do I do this question?
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