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Sav [38]
4 years ago
11

. 1. When work is done and a force is transferred which choice describes the movement of the object? (Points : 3). . a) When wor

k is done and a force is transferred an object must move in the direction of the force.. b) When work is done and a force is transferred an object moves opposite the direction of the force.. c) When work is done and a force is transferred an object does not move.. d) When work is done and a force is transferred an object moves perpendicular to the direction of the force.
Physics
2 answers:
MissTica4 years ago
6 0
I think that when work is done and a force istransferred an object must move in the direction of the force.
love history [14]4 years ago
5 0

Answer:

a) When work is done and a force is transferred an object must move in the direction of the force.

Explanation:

As we know that work done is given by the equation

W = F . d

now when work is done and force is transferred

then in that case the work done must be positive

so here we can say that angle between force and displacement must be acute angle

so here the displacement of object must be in the direction of the applied force so that the work done is positive.

So here correct answer would be

a) When work is done and a force is transferred an object must move in the direction of the force.

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A vessel at rest at the origin of an xy coordinate system explodes into three pieces. Just after the explosion, one piece, of ma
tresset_1 [31]

Answer:

Explanation:

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m- mass of first & second piece, 3m-mass of 3rd piece,\bar v_1-velocity of first piece(-23\dot i \ m/s) and \bar v_2 as velocity of 2nd piece (-23\dot j \ m/s)

Let \bar v_3 be velocity of 3rd piece=?

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m\bar v_1 +m\bar v_2 +3m \bar v_3=0   #Dividing both sides by m, m\neq 0

\bar v_1+ \bar v_2 +3\bar v_3=0\\3\bar v_3=-(\bar v_1 +\bar v_2)\\\bar v_3=-\frac{1}{3}(\bar v_1 +\bar v_2)

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