Recent content by jrk613

I was wondering how to modify F=ma and put in either static or kinetic friction coefficient. I assume it's something like F-(friction coef) but I'm just not sure, any ideas or websites someone can direct me to? thanks

Homework Statement A 4.94 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 12.1 N at an angle θ = 15.0° above the horizontal, as shown in the Figure. The coefficient of kinetic friction between the block and the floor is 0.100. What is the speed of the...

eh, no luck, thanks anyways folks... i'll find out the answer today

Changing the signs for the first half of the equation i get either + or - 26.832... for the second half i get + or - 75.21. I've tried combining all 4 combinations and all 4 are said to be wrong... any more ideas? thanks again.

so I would want to solve for t right? The time it will take? also should i cut the distance (d) in half to 349.5? Sorry, I'm just not very good at this but thank you very much for any help.

Homework Statement If the maximum acceleration that is tolerable for passengers in a subway is 1.70 m/s2, and the subway stations are located 699 m apart, what is the maximum speed that the train attains between stations? Homework Equations d= v(initial)t + .5at^2 The Attempt at...

Homework Statement A car traveling at a constant speed of 129 km/hr passes a trooper hidden behind a billboard. One second after the speeding car passes the billboard, the trooper sets in a chase after the car with a constant acceleration of 2.7 m/s2. How far does the trooper travel before...

Homework Statement A bolt comes loose from the bottom of an elevator that is moving upward at a speed of 6.88 m/s. The bolt reaches the bottom of the elevator shaft in 3.90 s. How high up was the elevator when the bolt came loose? Homework Equations d= v(initial)t + .5at^2 The...