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ZanzabumX [31]
3 years ago
5

9a driver has a reaction time of 0.50 s , and the maximum deceleration of her car is 6.0 m/s2 . she is driving at 20 m/s when su

ddenly she sees an obstacle in the road 50 m in front of her.
Physics
1 answer:
dolphi86 [110]3 years ago
7 0
The distance traveled during the reaction time is
d₁ == (20 m/s)*(0.50 s) = 10 m

The deceleration is  6.0 m/s²
The distance, d₂, traveled until the car comes to a complete stop is given by
(20 m/s)²  - 2*(6.0 m/s²)*(d₂ m) = 0
d₂ = 400/12 = 33.333 m

The total distance traveled before the car comes to rest is
d₁ + d₂ = 10 + 33.333 = 43.333 m
Because 43.333 m is less than 50 m, the car will not hit the object.

Answer:
The car comes to a stop before reaching the object. It will not hit the object.

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3 years ago
A basketball rolls without slipping (starting from rest) down a ramp. If the ramp is sloped by an angle of 4 degrees above the h
slavikrds [6]

Answer:

11.7 m/s

Explanation:

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a = 9.8 m/s²sin4(1 + 2/3MR²/MR²)

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To find its speed v after rolling for 60 m, we use

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v = √(u² + 2as) = √(0² + 2 × 1.14 m/s × 60 m) = √136.8 = 11.7 m/s

4 0
3 years ago
During convection, heat warms up a fluid, making the fluid less dense so it begins to RISE. As the warm fluid moves, it begins t
Fiesta28 [93]

Answer:

True

Explanation:

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It occurs by the movement of a part of substance from one place to another based on density and temperature differences.

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This analogy is commonly demonstrated in a boiling pot of water.

7 0
3 years ago
Read 2 more answers
Help! Will Mark Brainliest!
boyakko [2]

Answer:

D 5m/s

Explanation:

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