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3 years ago

Why does friction increase as speed increases??

1 answer:

7 0

Friction is directly related to air particles.

When we say that friction is high, it means that you're colliding with lots of air particles, and hence you can't speed up as easily.
Thus, the more air particles you encounter, the higher the friction.

The faster you go, the more particles you will encounter in a given time; hence at higher speeds, the friction is higher.

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2) A car going down the road has a velocity of 20 m/s. If the car continues at this

Artemon [7]

Answer: 140

Explanation: just multiply 7 x 20

5 0

3 years ago

Read 2 more answers

student built a simple heat engine that could lift masses. If the heat engine takes in 300 J of heat and loses 50 J to the envir

k0ka [10]

Answer:

So it will lift the mass by h = 17 m

Explanation:

As per energy conservation we know that

$Q_1 = W + Q_2$

here we know that

$Q_1 = 300 J$

$Q_2 = 50 J$

now we have

$W = 300 - 50$

$W = 250 J$

so work done by the engine is 250 J

now we have

$W = mgh$

$250 = 1.5 \times 9.81 \times h$

$h = 17 m$

4 0

3 years ago

You are operating a pwc. you are heading straight toward a dock. you turn the engine off and then turn the steering control hard

White raven [17]

In this case, the PWC will head for the dock. This is because, power needs to be applied in order to maintain steering control. If the throttle is left to idle or if the engine is turn off during operation, all steering control will be lost. In each of this situation, the PWC will continue in the was headed before the engine was turned off or before the throttle was left to idle.

6 0

4 years ago

Explica por qué unas sustancias se calientan más rápido que otras

Ierofanga [76]

Explanation:

in which languages you are saying

4 0

3 years ago

Can a body having zero velocity move with uniform speed? Give an example.

GaryK [48]

Sure. Body can move with uniform speed, and having zero velocity, when velocity becomes zero due to change in direction over time t.

For Example. - An Object is moving with uniform speed in a circular path, then after one complete revolution, it's velocity is zero, but speed still remains uniform

Hope this helps!

3 0

4 years ago