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3 years ago

Don’t get it hsnnakslldioksksk

Physics

1 answer:

bogdanovich [222]3 years ago

7 0

Answer:

D. momentum

Explanation:

Momentum is the product of velocity and mass which is the two variables the paragraph talked about.

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12m/s

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3 years ago

Volcanic eruptions are caused primarily by the movement of

Assoli18 [71]

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3 years ago

A race car goes around a level, circular track with a diameter of 1.00 km at a constant speed of 89 km/h. What is the car's cent

aniked [119]

Answer:

The car's centripetal acceleration is 1.22 m/s².

Explanation:

Given that,

Diameter of circular track $d= 1.00\ km=1000\ m$

Radius r = 500 m

Constant speed $v = 89\ km/h = 89\times\dfrac{5}{18}=24.722\ m/s$

The centripetal acceleration is defined as,

$a_{c} = \dfrac{v^2}{r}$

Where, v = tangential velocity

r = radius

Put the value into the formula

$a_{c}=\dfrac{(24.722)^2}{500}$

$a_{c}=1.22\ m/s^2$

Hence, The car's centripetal acceleration is 1.22 m/s².

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3 years ago

A car is being driven along a country road on a dark and rainy night at a speed of 20 m/s. The section of road is horizontal and

erastovalidia [21]

Answer:

Car collides.

Explanation:

The (negative) acceleration experimented by the car will be given by Newton's 2nd Law $a=\frac{f}{m}$ , where f is the friction force, which is the only force acting on the car on the horizontal direction. Its value is given by the formula $f=\mu N=\mu mg$ since the normal force and the weight of the car are balanced on the vertical direction. All this gives us the equation $a=\mu g$

To calculate the distance traveled by the car, we will use the equation for accelerated motion $v_f^2=v_i^2+2ad$ on the form (since it comes to a rest $v_f=0m/s$ ):