40 Answered Questions for the topic Friction

Physics Applications of Newton's Law w/ Friction

A 500 kg block sits on a horizontal tabletop. The coefficient of static and kinetic friction are 0.530 and 0.410 respectively, at the contact surface between table and block. An external force of... more
Friction Math Physics Work

04/03/20

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... more
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... more
Friction Physics Tension

10/08/19

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... more
Friction Physics Forces

08/03/19

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 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... more

07/30/19

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... more
Friction Physics Forces Torque

07/11/19

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... more
Friction Math Physics

06/30/19

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.
Friction Math Physics

06/30/19

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. 
Friction Math Physics

06/30/19

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.
Friction Math Physics

06/30/19

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... more

04/13/19

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 

01/23/18

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,... more

01/12/18

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... more

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... more
Friction Physics Forces

12/14/17

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... more
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... more
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... more
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... more

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