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Crazy boy [7]
3 years ago
12

If a car has an initial velocity of 20 m/s and accelerates at 2.0 m/s2 for 100 m, what is its final velocity?

Physics
1 answer:
rodikova [14]3 years ago
3 0

Answer:

28.28 ms-1

Explanation:

v² = u² + 2as

v² = 20² + 2×2×100

v²= 800

v = 28.28 ms-1

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Explanation:

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4 years ago
If a car is accelerating downhill under a net force 3674 N , what additional force would cause the car to have a constant veloci
Semenov [28]

Answer:

For the car to move with constant velocity the additional force required is  F__{dg} }=  -3674 \  N

Explanation:

From the question we are told that

  The net force of the car is  F_{net} = 3674 \  N

Generally the total  force acting on the  car is the net force plus the force due to gravity acting in direction of the car (Let denote it as F__{dg})

So the total force acting on the car is mathematically represented as

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Here this F representing the total force can be mathematically represented as

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Now for constant velocity to be attained, the acceleration of the car will be zero  

So  at constant velocity

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So  

     F_{net} + F__{dg}} = 0

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=>   F__{dg} }=  -3674 \  N

6 0
3 years ago
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