163 Answered Questions for the topic Forces

Forces Physic Momentum


Physics Question on Force

Hello, if someone may solve all this please with the steps on each problem that would be great. I'm having problems figuring this out. URGENT

If a book is resting on a table, Earth exerts a force on the book and the book exerts an equal force on Earth. Is this a Newton's third law pair?

If a book is resting on a table, Earth exerts a force on the book and the book exerts an equal force on Earth. Is this a Newton's third law pair?There is a normal force and the force of Earth but... more
Forces Physics


A contestant in a winter sporting event pushes a 45.0-kg block of ice across a frozen lake at a constant velocity.

A contestant in a winter sporting event pushes a 45.0-kg block of ice across a frozen lake at a constant velocity. If the coefficient of friction of ice on ice is 0.03, then what is the magnitude... more


Calculating spring constant experientially with the methods of compression and collision (the question on the experiment is bolded in the description)

In an experiment, the spring constant (k) was calculated by gathering data on force and displacement from a compression (Part 1) and a collision (Part 2). In both parts, the spring constant (k) was... more
Forces Physics Tension


What is the acceleration and the tension of the rope if there is no friction?

Two blocks of mass m1 = 5kg and m2 = 6kg are located on either side of a corner. The side of mass m1 has an angle of 30 ° and that of m2 has an angle of 60 °. What is the acceleration and the... more
Forces Physics Tension


What is the tension between the first and the second wagon?

A train of 10 wagons each having a mass of 4X10exp4 kg. Locomotive has a mass of 2,2X10exp5 and pulls the first wagon with a force of 8X10exp5 N. What is the tension between the first and the... more


Very hard hanging rod problem

A straight rod of 30 cm and 600 g mass is horizontally hanged on two upright, parallel and light threads, both of them attached with distances of 5 cm and 10 cm from its ends. Find tension forces... more


Force Applied and Impulse/ Newton's Third Law

How does the applied force of an object determine impulse?How is impulse and Newton's Third Law relate to changes in momentum for colliding objects?

Protons experience both electric and gravitational forces. Comparing the forces between 2 protons in a nucleus, it is correct to state that

A electric force is much stronger than the gravitational forceB gravitational force is much stronger that the electric forceC electric force is shorter range than the gravitational forceD... more


The 100m dash can be run by the best sprinters in 10.0 s.

A 65 kg sprinter accelerates uniformly for the first 50m to reach top speed, which he maintains for the remaining 50 meters.a) What is the average horizontal component of force exerted on his feet... more


Physics- Forces/Free Body Diagram Questions

A horizontal force of 76N is required to slide a 23kg box across a tile floor at constant velocity. What is the coefficient of sliding friction between the box and the floor? PLEASE I AM STRUGGLING!
Forces Physics Friction


What role does static friction force play for a rolling object? How can I know what direction it points?

Fundamentally, what does a friction force do for a rolling object? I am very confused by the way my textbook explains it. In my textbook , it says: A wheel rolling on a horizontal flat surface at... more

Why shouldn't gravity be a force?

Why shouldn't gravity be a force? I am interested to know the reasons why we shouldn't treat gravity as a force in, for example, General Relativity. Won't we be able to model it accurately by... more

Why is less force required to open a door when we apply a force at a greater distance from the hinge?

I know that the magnitude of a torque increases with the distance from the axis of rotation. What is the reason of that : how can a force exert a greater torque when the force is applied at a... more

What's the core difference between the electric and magnetic forces?

I require only a simple answer. One sentence is enough... (It's for high school physics)


What physical forces pull/press water upwards in vegetation?

Each spring enormous amounts of water rise up in trees and other vegetation. What causes this stream upwards? Edit: I was under the impression that capillary action is a key factor: the original... more

Understanding tension?

I'm trying to understand tension. So here it goes: I'll start from the beginning. Let's assume I'm in space and can move around and apply forces. Let's say a rope is attached to a body(which is... more


Small car colliding with large truck?

A small car collides with a large truck. Why do both vehicles experience the same magnitude of force? Wouldn't the large vehicle experience less force than the small one?
Forces Physics Water


When displacement isn't possible?

Stop me if i'm wrong but displacement is, for example, when you enter a bathtub the water level rises around you. What happens when displacement isnt possible? I'll give an example. I have two... more

Why can't charged objects exert electrostatic forces on heavier objects?

We know that, for example, amber rubbed with fur attracts bits and pieces of straw, paper, Styrofoam, etc. which are all light objects. Why don't they attract heavier objects, likewise?


When a ball is tossed straight up, does it experience momentary equilibrium at top of its path?

This question has been asked many times all over the Internet and answers can be found on places such as yahoo and ask.com, but I'm not satisfied with those answers and I don't trust the validity... more

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