Homework Statement
A car at the Indianapolis 500 accelerates uniformly from the pit area, going from rest to 320km/h in a semicircular arc with a radius of 200 m. Determine the tangential and radial acceleration of the car when it is halfway through the arc, assuming constant tangential...
Homework Statement
a 1000kg sports car moving at 20m/s crosses the round top of a hill (radius of 100 m) . Determine the normal force on the car
Homework Equations
Newton’s second law
F=ma
The Attempt at a Solution
I figured out the centripetal acceleration
Ac= v^2/r
= 4 m/s^2
My attempt...
Okay, Noted .
Now I’m having some difficulties, so for vertical components , it will be :
Fncos(theta) = mg+ Ffsin(theta)
And the other equation being :
Fnsin(theta) + Ffcos(theta) = mv^2/r
Do I isolate Fn and substitute It into the other equation to solve for Ff ? Or do I break down Ff...
Homework Statement
If a curve with a tedious of 80m is perfectly banked for a car traveling 70km/h, what must be the coefficient of static friction for a car not to skid when traveling at 90 km/h ?
Homework Equations
Newton’s second law
F=ma
The Attempt at a Solution
To find the angle of the...
Homework Statement
I need help getting started with this problem
At what altitude above the surface of the Moon must a lunar module orbit in order to complete each orbit in 1 h 49 min 39 s?
Homework Equations
g= Gm/r^2 ?
The Attempt at a Solution
Not quite sure how to start or anything , any...
Homework Statement
An astronaut throws a rock at 12 m/s at an angle of 25° above horizontal from a height of 3.25 m above the surface. How far horizontally does the rock travel before hitting the surface of Pluto?
Pluto has a mass of 1.27 E22 kg
And a radius of 1.14E6 m
Homework Equations...
Homework Statement
A roller coaster reaches the top of the steepest hill with a speed of 7.0 km/h. It then descends the hill, which is at an average angle of 43° below horizontal and is 46.0 m long. What will its speed be when it reaches the bottom? Assume the coefficient of kinetic Friction...
Homework Statement
I’m working on a problem that requires adding 3 vectors . And while I was following the book, it said to find the angle to divide the y over the x components of the resistant , and showed the angle to be -1.25 but then follow d to change to -51 .
How did it change ? The book...
Homework Statement
Place a book flat on a table and press down on it with your hand. Now suppose the hand-book and table- book values of are 0.50 and 0.40, respectively; the book's mass is 0.90 kg and your downward push on it is 10 N. How much horizontal force is needed to keep the book moving...