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3 years ago

A dragster going 15m/s increases its velocity to 25 m/s north in 4 seconds.

1 answer:

3 0

Initial speed, v₁ = 15 m/s
Final speed, v₂ = 25 m/s
Duration of the acceleration, t = 4 s

Calculate the acceleration.
a = (v₂ - v₁)/t
= (25-15 m/s)/(4 s)
= 2.5 m/s²

Answer: 2.5 m/s²

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3 years ago

The angle between incident ray and reflected ray is 80 degrees. What is the value of angle of incidence?

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The angle of incident ray is 40°.

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Given that the angle of incident and reflected ray are the same. In this question, we had given that both angles added up will gives you 80° so you have to divide it by 2 :

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3 years ago

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n200080 [17]

Answer:

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Impulse is equal to the product of constant force applied to an object for a very small interval. Impulse is also calculated as the total change in the linear momentum of an object during the given time interval.

The magnitude of impulse is the absolute value of the change in momentum.

$|J|=|p_f-p_i|$

Momentum of an object is equal to the product of its mass and velocity.

So, the initial momentum of the car is given as:

$p_i=mv$

The final momentum of the car is given as:

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Therefore, the impulse is given as:

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3 years ago

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4 years ago

Read 2 more answers