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3 years ago

15

A car is traveling in a straight line at a constant speed. The car's engine is exerting a constant force on the car. Explain why

the car is not accelerating.

1 answer:

kherson [118]3 years ago

5 0

Answer:

because its not going down a long hill instead its going on a leveled street

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What is the average speed of a kangaroo that hops 60 m in 5 s ?

jok3333 [9.3K]

The formula for average speed is
$v_{avg}= \frac{total distance}{total time}$
So we can just substitute our data.
$v_{avg}= \frac{60}{5}=12 \frac{m}{s}$ - its the result

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A red rubber ball rolls down a hill from rest with an acceleration of 7.8 m/s 2 . How fast is it moving after it has traveled 5

Wittaler [7]

Answer:

8.83m

Explanation:

Given parameters:

Acceleration = 7.8m/s²

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Unknown:

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The equation to solve this problem with is given as;

V² = U² + 2aS

V is the final velocity

U is the initial velocity

a is the acceleration

S is the distance

Input the parameters and solve;

V² = 0² + 2 x 7.8 x 5 = 78

V = √78 = 8.83m

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