a total of 15000 ft. lb of work is used to lift a load of bricks to a height of 50 ft. the weight of the bricks is

The weight of the brick will be "300 lb".

Given:

Work done,

Height,

As we know the formula,

→

or,

→

By substituting the values, we get

→    

→    

Thus the response above is right.  

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The weight of the brick is 300 lb.

Explanation:

Given that,

The work done in lifting a load of bricks = 15000 ft lb

It is lifted to a height of 50 ft

We need to find the weight of the brick. The work done by an object is given by :

Here, F = W (weight of the bricks)

So, the weight of the brick is 300 lb.

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.