Hi all, I'm a new member here. I've encountered a lot of help from searching through this website! I've searched through several threads dealing with friction and torque on here, but still can't quite figure out this problem...
Homework Statement
A plot of \tau vs. \alpha has a vertical...
Homework Statement
A 275 N box is sliding down a frictionless inclined plane. If the incline makes an angle of 30.0 degrees with the horizontal, what is the acceleration along the incline?
I don't need to know how to figure out the solution to this problem - yet, atleast.
Im trying to...
Homework Statement
I am having some difficulties finding out the force of friction for an inclined plane. If we know the mass of the object, the angle of the inclined plane, and the acceleration, how to we find Ff?
I know how to draw the diagrams, but I can't seem to find what force of...
Homework Statement
Ok, I am doing attempting to do a lab report right now and I am unable to find the forces that I need.
This is what i am being asked to do:
"Plot the force (not mass) applied by the sand versus the force exerted on the track by the block and its load for both the...
Homework Statement
Joe puts 11400 J of energy to drag crate 25 m across floor with constant speed. Rope makes 48 degree angle with horizontal.
Force exerted by the rope on the crate?
What is the force of friction acting on the crate to impede its motion?
What work is done by the floor...
I have to find the force of friction against a rocket that we launched at school. How would I do that?
I know coefficient = Friction/Fn
I only have Fn, how do I find the frinction?
I'm really lost :(
Homework Statement
A car of weight 1500 N has its brakes locked. Calculate the force needed to begin to drag he car on dry asphalt. How will the force needd to slide it along the asphalt compare with the force needed to start sliding it? Why? (Static coefficient=1.2, Kinetic coefficient=0.8)...
seld pulled at a constant velocity acroos a horizontal snow surface, if force 80 apploed to the sled rope at an angle of 53 to the ground,
what is the magnitude of force of friction of the snow?
i don't know how to solve it
i have test 2morrow
i need some explanition plez
Sum of all Forces= Force - Force of Friction
We have Formulas to use in our physics test for an object on an inclined plane w/ friction: Sum of all Froces= F-Ff,
Sum of all Forces=ma,
a=(Sum of all Forces)/m
Ff=Uk(N)
and Sum of all...
Homework Statement
A man slides a 100.0 kg box along the floor for a distance of 4.0m. If the coefficient of kinetic friction is 0.250, and the man does the job in 3.6s, what is his power output in watts?
Homework Equations
W=Fd
P=W/t
The Attempt at a Solution
I don't know how...
Homework Statement
A uniform 15kg ladder whose length is 5.0 m stands on the floor and leans against a vertical wall, making an angle of 25 degrees with the vertical. Assuming that the friction between the ladder and the wall is negligble, what is the minimum amount of friction between the...
The board which weighs 86.5N is sandwiched between two other boards. If the coefficient of friction between the boards is 0.544, what must be the magnitude of the horizontal forces acting on both sides of the center board to keep it from slipping downward?
[b]2. Force of friction =...
Homework Statement
find the average of a block being propelled propelled by an elastic band.
We know it is uniform acceleration.
my attempt on this problem
Measure the force applied of elastic band with a Newton scale. The more you strecth the farther the distance the block will travel...
Homework Statement
hi guys,
i am having trouble with this problem.
Calculate the average force of friction acting on a wood block as it is propelled along the floor by an elastic band ?
my solution and my ideas:
What does it mean by average froce of friction?
I first weighed the piece...
A 2.5 kg block is initially at rest on a horizontal surface. A horizontal force of magnitude F = 6.0 N and a vertical force of magnitude P are then applied to the block. The coefficients of friction for the block and surface are μ_s = 0.40 and μ_k = 0.25. Determine the magnitude of the...
Homework Statement
A sled pulled out a constant velocity across a horizontal. If a is a horizontal force of 8.0 x 10^1 N is applied at an angle of 53 degrees in the ground. What is the force of friction between the sled and the snow?
Homework Equations
I convert the N into grams...
I've got 2 problems:
Number 1: Greg is pushing a 32 kg crate across the floor. He is making like difficult by applying his 800 N force down at an angle of 37 degrees below the horizontal. The coefficient of kinetic friction between the crate and the floor is .50.
I need to find the normal...
can anyone show me how to solve this problem?
a cart on wheels with a mass of 250 g has a motor driven propeller with a force P of .3 N, and it moved down an incline of 30 degrees with an acceleration of 3.5 m/s^2.
What is the force of friction ?
determine coefficent of friction
can anyone show me how to solve this problem?
a cart on wheels with a mass of 250 g has a motor driven propeller with a force P of .3 N, and it moved down an incline of 30 degrees with an acceleration of 3.5 m/s^2.
What is the force of friction ?
determine coefficent of friction
I'm working on this problem for homework. Basically it's to find the work done by friction. Now for the work it would be the force of friction times the displacement. The problem is the board being pushed is going over 2 different surfaces, with 2 different values for friction, at the same time...
please help me FRICTION
A 8.1g bullet leaves the muzzle of a rifle with a speed of 605.8m/s. What constant force is exerted on the bullet while it is traveling down the0.5m lengthof the barrel of the rifle? answer in N.
Thanks in advance!
This is my problem
A 15 kg child slides, from rest, down a playground slide tht is 4.0 m long, as shown in the figure. The slide makes a 40 degrees angle with the horizontal. The child's speed at the bottom is 3.2 m/s. What was teh force of friction that the sldie was exerting on the...
This is probably horribly easy, but it's almost 1 AM so I'm going nutty trying to figure this one out.
The questoni: "A 2000kg car is traveling at a constant 30m/s with the motor producing a force of 4000 N forward. Find the force of friction."
I drew the diagram. Is acceleration 0...
with a terminal speed of 0.2 mm/s. The particle has a mass of 10^-10 g and a retarding force of the form bv. What is the value of b? i converted everything to SI and i got -4.905e-08 kg/s but it is wrong.. am i close?
another question...
A bicyclist travels in a circle of radius 26 m at a...
I'm stuck! Please help! I have been looking @ this problem for 2 hours! :rolleyes:
A 1200 kg car has a speed of 30 m/s - it runs out of gas and coasts, stopping in 40 secs. What is average force of friction on the car?
Do you find the car's acceleration first? There is no force, so you...
Question: Determine the average force of friction over the first drop and over the entire trip from top to bottom.
This is a question of have from a lab experment which was when we designed a "roller coaster" for a ball (it was a downwards ramps with 2 humps on it). I have the actual...
A 19.1 kg block is dragged over a rough, hor-
izontal surface by a constant force of 195 N
acting at an angle of angle 29.1 degrees above the
horizontal. The block is displaced 30.3 m,
and the coeficient of kinetic friction is 0.116.
The acceleration of gravity is 9.8 m/s^2 .
the...
a block of mass 10kg is attached to a spring with a constant of 1850 N/m. the coefficient of sliding friction between the block and the surface is .25
the block is pulled back 11 cm to the right and released.
the question asks the speed at different points, and how far the distance after...
How do you calculate the force of friction on an inclined plane(ramp) a certain number of degrees from the horizontal?(Which formula is used)
Mass of block = 10 Kg
Angle of incline = 30 degrees
Coefficient of friction = 0.25
Gravity = 9.8m/s2
What is the acceleration of the blockdown...
A 5kg object slides 100m down a frictionless inclined plane dropping 45m. It then slides along a horrizontal surface with a coefficiet of kinetic friction of .75 intil it stops. How long does it take to stop after it leaves the inclined plane?
I'm not sure how to get the time. Here's what I...
i need any help that anyone can give me... i understand some things in physics, but i don't get the big picture, and I am really not sure of how to do things, and i am really confused about this one problem in particular...
it states: a tractor uses a chain to drag a 675kg tree along the...
masses m1=4.00kg and m2=9.00kg are connected by a light string tht passes over a frictionless pully. m1 is held at rest on the floor and m2 rests on a fixed incline of 40.0degrees. the masses are released from rest, and m2 slides 1.00m down the incline in 4.00seconds. determine the acceleration...
Any help?
A(n) 990 kg car is parked on a 4 degrees incline.
The acceleration of gravity is 9.8 m/s^2.
Find the force of friction keeping the car
from sliding down the incline. Answer in
units of N.
would the force of gravity also double? and what about when the force of gravity triples, then what would happen to the force of friction? Would it be the same down the road, like for example, when it quadruaples, would the force of friction also quadruaples..and have a direct relationship btw...
I'm having trouble with the following problem:
If a curve of radius 80.0 m is perfectly banked for a car moving 70.0 km/hr, what must be the coefficient of friction in order to prevent skidding when the car is moving at 90.0 km/hr.
OK, I know that I need to find the angle of the "perfectly...
You are pulling a 15kg wagon by the handle (with 5N of force) forming a 45 degree angle level to the ground. What is the force of friction on the wagon?
Okay, is it just me, or does this problem seem way to easy to be worth 100 pts?
It's -3.54N, right? Is the weight of the wagon irrelevant...