34 Best Force Questions and Answers (Q&A) - ProProfs Discuss

What is the main type of intermolecular forces in PH3?

Anthony Paul Bonadio, Teacher
Answered: Feb 26, 2019

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...Read More

2 Answers

5354 views

What is the effort required to lift the load? The diagram shows a light beam pivoted at one end.

Christian Jackson, Content Developer
Answered: Feb 01, 2019

The answer to this question is 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...Read More

5 Answers

1587 views

What force causes motion?

Jagran josh
Answered: Apr 20, 2024

Newton’s first law of motion

1 Answer

968 views

Which model component illustrates the effect of gravity in the following case? A model of the earth going around the sun is made from a ball (the earth) attached to a string attached to a...

Y. Dawne, Content Blogger
Answered: Feb 07, 2019

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...Read More

2 Answers

933 views

When is the turning effect of a force on a door greater?

A. Cook, English Professor
Answered: Jan 02, 2019

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...Read More

3 Answers

913 views

What is the value of the resultant turning moment about the pivot at the instant when the rule is horizontal?

A. Daniels, Professor
Answered: Apr 09, 2019

The correct answer to this question is 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...Read More

3 Answers

844 views

When will two equal and oppositely directed forces acting on an object be in equilibrium?

Angsh
Answered: Apr 20, 2024

When their moments about the same point are equal

1 Answer

833 views

Can you rank the following molecules in order of increasing boiling point: NaF (salt), H2S, HF, CO2?

Wyatt Williams
Answered: Apr 20, 2024

CO2 < H2S < HF < NaF

Nonpolar Molecules (Symmetrical distribution of charge)=London Dispersion (weakest IMF's, lowest boiling point); Polar Molecules (Asymmetrical distribution of...Read More

1 Answer

798 views

What with a nut can be loosen more easily?

Angsh
Answered: Apr 20, 2024

Long spanner because a large turning effect can be produced.

1 Answer

721 views

What is the force F needed to balance the bar shown?

Angsh
Answered: Apr 20, 2024

1 Answer

720 views

What must the charge of the ball be? A metal ball hangs from the ceiling by an insulating thread. The ball is attracted to a positive-charged rod held near the ball. This question is...

Jkeslin
Answered: Apr 20, 2024

Negative or neutral

Clearly, the ball will be attracted if its charge is negative. However, even if the ball is neutral, the charges in the ball can be separated by induction...Read More

1 Answer

712 views

What are the effects of force on an object?

John Smith
Answered: Apr 20, 2024

Force can change the direction of an object. Force can change the shape of an object. Force can increase the speed of a moving...Read More

1 Answer

610 views

When is the turning effect of a force on a door greatest?

Angsh
Answered: Apr 20, 2024

A point far away from the hinges and perpendicular to the door

1 Answer

592 views

Why does the shape of a balloon change when it is held between the hands and pressed?

John Adney
Answered: Jun 18, 2017

Balanced forces act on the balloon.

2 Answers

546 views

What accounts for the higher boiling point of NH3? At standard pressure, NH3 has a boiling point of 240 K, AsH3 has a boiling point of 211 K, and PH3 has a boiling point of 186 K. This...

Hanmstoddard
Answered: Apr 20, 2024

NH3 has a higher boiling point, because it contains hydrogen bonds.

Nonpolar Molecules (Symmetrical distribution of charge)=London Dispersion (weakest); Polar Molecules (Asymmetrical...Read More

1 Answer

540 views

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