171 Answered Questions for the topic Forces

#### The uniform rod of length L shown above is supported by holding end X

The uniform rod of length L shown above is supported by holding end X so that the rod makes an angle 60° with the horizontal floor. There is no friction acting between the rod and the floor. When...
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#### Acceleration and force

A 5 kg mass object is moving with an acceleration of 2 m/s^2. After 4 s from the start of the observation, its measured velocity was 12 m/s. What is the force acting on the body? (Answer 10 N)I...
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#### Physics problem about floating ball

A closed sphere/ball is floating (half of it is in the fluid). The sphere's mass is m, density ρ. What is the formula for finding the volume of the sphere?The correct answer is 2m/ρ.Can you show...
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Forces Physics

06/16/21

#### static forces problem

Perry (5.20 kg) slides down a ramp (26° relative to horizontal).Starting from rest, the platypus slides a diagonal distance of 2.1 m in 4.8 s.What is the coefficient of kinetic friction between the...
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Forces Physics

06/02/21

#### What is the dimensional unit for one newton?

The newton is the unit for Force. We know that Force is equal to mass multiplied by acceleration. What is the dimensional unit for one newton? Show your work.Not sure how to answer this ^ anything...
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Forces Physics

05/20/21

#### physics (forces)

A non-zero net force acting on an object can have which of the following effects on the object?Question 1 options:
the velocity can increase
the velocity can decrease
the velocity of the...
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Forces Physics

05/20/21

#### Physics (forces)

A net force of 10.5 N [E] acts on a 25 kg bike. If the final velocity of the bike is 8.0 m/s [E] after 5.0 s, what was the initial velocity of the bike?

#### What is the net force acting on this object?

The forces acting on an object are 39N[N], 13N[S], and 12N[N]. The net force acting on the object is:a. 38N[N] b. 64N[S]c. 64N[N]d. 14N[N]e. none of the above

#### 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

01/18/21

#### 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...
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Forces Physics

12/14/20

#### If a 600kg helicopter is accelerating upwards at 3m/s/s what is the unbalanced force, the gravitational force, and the supporting force of the air?

Forces Physics

12/14/20

#### 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...
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#### 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...
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#### 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...
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#### 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...
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08/11/20

#### 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...
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Forces Physics

07/10/20

#### A 10.0 kg crate initially at rest sitting on a floor with a coefficient of static friction of 0.20 is pushed with a force of 15 N for 4.0 s. What is the work done?

15 J
60 J
10 J
600 J
0

#### 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?

10/25/19

#### 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...
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10/14/19

#### 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...
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10/02/19

#### 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

09/17/19

#### A 0.75 kg ball of clay is thrown at the wall at a speed of 12 m/s (which after it sticks). It takes 0.1 seconds for the ball to come to a complete stop. What is the deceleration of the ball?

#### 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...
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08/03/19

#### 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...
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