Recent content by bling-bling

Homework Statement In the disc brakes that slow down a car, a pair of brake pads squeezes a spinning rotor; friction between the pads and the rotor provides the torque that slows down the car. If the normal force that each pad exerts on a rotor is 85 N, and the coefficient of friction is 0.62...

So our scale weight is increasing as we're going down? Shouldnt it be decreasing? Because my teacher said, that the formula should be Fn = ma + -mg

well the elevator is moving downward, and if the accleration is upward, doesn't that mean that the elevator is slowing down?

Homework Statement A weighs 600 N on an elevator when it is stationary. Each elevator accelerates according to the specified arrow that is drawn next to it. In all cases where the elevator is moving, it is moving downward. Find net force, if the elevator is accelerating 2.0 m/s/s upward, even...

so the 0.001 is not the distance that the runner won by? if not, how do i figure that out?

Homework Statement You nose out another runner to win the 100.000 m dash. If your total time for the race was 11.800 s and you aced out the other runner by 0.001 s, by how many meters did you win? Homework Equations a = v-v0 / t The Attempt at a Solution So i found the acceleration...

so would the units be m/s or not since it asks for magnitude??

because what i have as an example in my homework is that they use the angle that is given. for example, if they say that the bear turned 65 degrees, that's the angle they use in the formula, in my example.

caleb did u get 1785m as the magnitude? and why did u put a negative sign infront of the cos(148) because that doesn't belong there.. right??

so i use the sine formula to find the direction but what i got for magnitude, is that right?

for a why would theta be greater than 90? and how do i use the sine formula for the direction?

haha. but are my answers right?

i thought it was like the bear went 1563m west then turned 32 degrees NW and headed 3348 m in that direction?

i have no idea what they mean either, but that's what it says in my assignment. do u want me to post a copy of the assignment so u can look at it?

Homework Statement In wandering, a grizzly bear makes a displacement of 1563m due west, followed by a displacement of 3348m in a direction 32 degrees NW. What are the (a) the magnitude and (b) the direction of the displacement needed for the bear to return to its starting point? Specify the...