mastering physics To understand how to compute the work done by a constant force acting on a particle that moves in a straight line. In this problem, you will calculate the work done by a constant force. A force is considered constant if F⃗ (r⃗ ) is independent of r⃗ . This is the most frequently encountered situation in elementary Newtonian mechanics.

Complete Question

The complete question is shown of the first uploaded image

Explanation:

 The  force vector acting upon the particle is (The magnitude is F )

  The displacement vector from point B to A is   (The magnitude is  L )

Generally workdone is mathematically represented as

But from the question we are to that vector L has a magnitude L  and  makes and angle with the positive x-axis

also  we are told that Force is pointing to the left and is parallel to the horizontal  axis (i.e at angle   (180°))

Generally the angle between the is  

Hence the workdone is mathematically represented as

=>    

Here the negative sign shows that the displacement is acting in opposite direction to the direction of the workdone (the force applied )

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.