39 Answered Questions for the topic Friction

#### You are pushing a large box across a frictionless.....(IN THE DESCRIPTION)

You are pushing a large box across a frictionless floor by applying a constant horizontal force. If the box starts at rest, you have to do work W_1 in order for the box to travel a distance d in...
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Friction Physics

10/22/19

#### Frictional forces

A shopper at the Fries’ market place pushes a 13.0-kg shopping cart at a constant velocity for a distance of 58.7 m on a level surface. He pushes in a direction 24.50 below the horizontal. A 53.8 N...
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#### Frictional Forces

A truck is hauling a trailer along a level road with a horizontal drawbar. The mass of the truck is mtruck = 9.00 x 103 kg and the mass of the trailer is mtrailer = 1.80 x 104 The two move along...
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#### 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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#### Why do we take small steps while walking on ice?

> When we walk on ice we should take small steps. Small steps ensure:
>
> a.)larger friction.
>
> b.)small friction.
>
> c.)larger normal force.
>
> d.)smaller...
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#### Why does a car engine not do work if the wheels don't slip?

I saw this mind boggling result that if the tires don't slip then the work done by an engine to move a car is zero. Why is this true? Moreover, what does this truly mean?
**Update:** Sorry about...
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#### finding angular velocity and regular velocity when bouncing off a surface with friction?

Take the game of pong as a simple example. When you hit the ball with a paddle that has a frictional surface, the ball will spin as well as change direction according to the coefficient of kinetic...
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#### Learning Friction #5

A box sits on a frictionless ramp of 19 degrees. Find the acceleration of the box as it slides down the hill.

#### Learning Friction #4

A 2 kg box sits on a table where the coefficient of friction is 0.2. A 20 N horizontal force pulls the box to the right. Find the acceleration.

#### Learning Friction #3

A 4 kg box sits on a ramp with an angle of 5 degrees, where the coefficient of friction is 0.1. Calculate the friction that will oppose any motion.

#### Learning Friction #2

A 3 kg box sits on a table where the coefficient of friction is 0.3. Calculate the friction that will oppose any motion.

Friction Physics

05/19/19

#### How to find the coefficient of friction between 2 surfaces?

A 50kg rock slides down the side of a volcano that slopes up an angle of 30 degrees to the horizontal. If the rock accelerates at a rate of 3 m/s^2, what is the coefficient of sliding friction...
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#### Why do ballpoint pens write better on pages that have pages below them?

If I write on the starting page of a notebook, it will write well. But when there are few or no pages below the page where I am writing, the pen will not write well. Why does this happen?

06/29/18

#### If a 1200 kg car slows from 20 m/s to 12 m/s over a distance of 20 m, what is the force of friction that the brakes apply?

im practicing for a test and have no idea how to do this

#### How far will it travel along the horizontal surface before it stops?

A 3.2 kg crates slides along a 6.0 m horizontal surface with speed of 5.0m/s. It then moves down along an incline with a lenth 6.0m and a height from the ground of 4.5 mand then along a second,...
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#### What speed will the child reach the bottom of the slide

A 42 kg child slides from the top of a 3 m high playground slide. With what speed will the child reach the bottom of the slide assuming: (a)There is no friction? (b) 23 J of energy is dissipated...
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12/30/17

#### Physics Mechanical Energy and Friction

An asteroid with a mass of 5.0 x 105 kg collides with the Earth and slides horizontally along the ground without bouncing (not actually possible but just pretend). The velocity of the asteroid...
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#### Forces on inclines

Why is it easier to pull an object up an incline rather than pushing?

12/14/17

#### A 2kg block is resting on a rough incline which is at a 30 degree angle.

Which is larger, the normal force or the force of friction?

Friction

12/09/17

#### friction problem

To determine the coefficient of friction between a rough surface and a block, the surface is kept inclined at 45° and the block is released from rest. The block takes a time t in moving a distance...
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Friction

11/30/17

#### a block is moving with a velocit v on a straight surface what is the shortest distsnce and shortest time the block can be stopped

this is a question of friction i want the answer

Friction

09/24/17

#### Will bob will be able to stop his car before hitting the tree branch

Bob is driving his 2400 kg car on a wet road at 50 mph when he sees a tree branch in the middle of the road 60 meters ahead of him and immediately slams on the breaks. If the coefficient of...
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Friction

09/23/17

#### Will he be able to stop

Bob is driving his 2400 kg car on a wet road at 50 mph when he sees a tree branch in the middle of the road 60 meters ahead of him and immediately slams on the breaks. If the coefficient of...
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Friction

09/23/17

#### How far will the block slide before it comes to a stopper far will

A block of mass 13.6 kg is sliding at an initial velocity of 4.65 m/s along a horizontal surface to the right. The surface has a coefficient of friction of 0.254. How far will the block slide...
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07/30/17

#### Energy lost to heat

In an attempt for a physics teacher to explain the conservation of energy to a student, the teacher goes down a 6.0 m high sliding board. At the bottom, he only travels 7.0 m/s. If the mass of the...
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