# Force Questions and Answers (Q&A) #### Unknown

The answer to this question is letter A. 50. Those who are not too familiar with the different formulas that are used in physics may have no idea how this is the correct answer. It is best to check out the given. The formula that will be used for this is F1D1=F2D2. 200N (20)/50. The answer to this will be 50.

The right amount of force is important because of different reasons. There are some items that will break down when you use too much force. There are also some items that will not move at all when you do not exert the right amount of force that the item needs. #### angsh

The correct answer to this question is B, 160NCM anticlockwise. This question deals with forces and moment. The metric rule of this question is uniform in the weight act. This uniformity creates an anticlockwise moment. The 4.0N weight is downward at one end, creating a clockwise moment.

This resultant moment equals to (4.0 x (100-60) x 10) - (16.0 x 0.1), which equals 160nm. The resulting moment is not able to be zero. In this question, the rule is an instant, which is why it is unable to be zero. If the rule was remaining horizontal at equilibrium, then zero would be a possibility. #### stgeorge

Not good didn't understand what to do make it clearer #### T. Lopez

Let's see how far my knowledge stretches

Electromotive force is abbreviated, 'emf.' It refers to the total amount of voltage generated by a source or battery in a circuit. Electromotive force is a non-physical force or energy that is required to move a positive unit charge from the negative panel to the positive panel of a circuit when opened. Emf was also formally defined as the force required separating two unlike charges from each other. Emf is denoted with the ‘epilson’ signal, and its unit is voltage.

So, we can describe the electromotive force is the maximum voltage level that a circuit can attain. On the other hand, the potential difference can be said to be the ratio of work done per unit charge to convey a charge between the positive and negative terminal of a battery. In a closed circuit, a particular portion of the electromagnetic force is required to overcome the internal resistance of that battery. The energy required to do this is referred to as a potential difference. #### angsh

Well can anyone plz tell me the reason for this ans #### stgeorge

The grammar in these questions is terrible!!!! #### angsh

The correct answer is option C
When turning a door the turning effect of a force on a door is greater at a point far away from the hinges and perpendicular to the door. The turning effect of a pivot is known as the moment about that point. The moment of a force is a measure of its turning effect.

Moment = force perpendicular distance from the line of action of the force.

The hinge end cannot move, if you apply force at the hinge, it won’t rotate because all of that force will be opposed by the wall to prevent the hinge from moving. However, as the applied force begins to move away from the hinge the turning effect of force is greater and movement is likely to occur.
Therefore other options (A, B and D) are wrong. #### angsh

How u get 50 on this diagram to be contf #### hanmstoddard

PH3, otherwise known as phosphine and is quite toxic and flammable, forms a dipole-dipole because it is a polar molecule. We know it is polar because it has a lone pair and therefore its geometry is non-symmetrical as predicted by the VSEPR model.

Nonpolar molecules have a symmetrical distribution of charge, and the London dispersion is the weakest intermolecular force. Molecules with H-F, H-O, or H-N (because of big EN) are known as hydrogen bonding; saltwater (ionic compound and water) are known as non-dipole forces. Since PH3 is a polar molecule without H-F, H-O, or H-N, this qualifies as having dipole-dipole forces. #### psudio

The correct answer to this question is B.

Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun. Gravity is very important to us. We could not live on Earth without it. The sun's gravity keeps Earth in orbit around it, keeping us at a comfortable distance to enjoy the sun's light and warmth. It holds down our atmosphere and the air we need to breath.

Gravity is what holds our world together. Gravity is what holds the planets in orbit around the sun and what keeps the moon in orbit around Earth. The gravitational pull of the moon pulls the seas towards it, causing the ocean tides. Gravity creates stars and planets by pulling together the material from which they are made.  