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3 years ago

With what maximum precision can its position be ascertained? [hint: ?p=m?v.]

1 answer:

5 0

The formula for the momentum is
p = mv
As a consequence of the conservation of energy, there is also the law of conservation of momentum.
So,
Δp = Δmv = mΔv
The maximum precision that the position can be ascertained is less than 100% because of dissipation.

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Biotron

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A road perpendicular to a highway leads to a farmhouse located 7 mile away. An automobile traveling on the highway passes throug

Fantom [35]

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The rate at which the automobile is moving away from the farmhouse is 27.29 m/h.

Explanation:

As shown in the figure, A denotes the position of farmhouse, B be the location of highway intersection and C be the direction along which automobile is moving.

Consider s be the distance between farmhouse and automobile which is represent by AC, x is the distance between intersection and automobile which is represent by BC and the distance between intersection of highway and automobile is represent by AB.

Applying Pythagoras Theorem to the figure,

(AB)² + (BC)² = (AC)²

Since, AB = 7 miles, BC = x and AC = s.

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3 years ago

A 1200-kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 9,000-kg truc

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given,

mass of car (m) = 1200 Kg

speed of cur, u = 25 m/s

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m u + M u' = m v + M v'

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b) To calculate losses, we will find the kinetic energies before & after collision. Any difference would give us the losses (in energy form).

(K E)₁= (K E)₂+ Losses

losses = (K E)₂ - (K E)₁

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