Recent content by lefthand

they didnt give an angle. but I'm guessing since we want x to equal what ever number is there, then cos must equal 1 right?

this here is the problem... Use the equations below. (Note that the direction is indicated by the sign in front of the equations.) x = (0.0553 m) cos(4.094t + 0.14π) v = −(0.226 m/s) sin(4.094t + 0.14π) a = −(0.927 m/s2) cos(4.094t + 0.14π) (a) Determine the first time (t > 0)...

Suppose the wheel is rotated at a constant rate so that the mass has an upward speed of 4.07 m/s when it reaches a point P. At that moment, the wheel is released to rotate on its own. It starts slowing down and eventually reverses its direction due to the downward tension of the cord. What is...

Yeah i tried that too, and it said it was wrong

yeah i tried -9000 and i still got it wrong.

A 1 260 kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the back of a 8 000 kg truck moving in the same direction at 20.0 m/s. The velocity of the car right after the collision is 18.0 m/s to the east. (a) What is the velocity of the truck right after...

i didn't put those answer. i really don't know how to do this problem or where to start

i need help with this problem. i have no idea how to do this. A 1.41 kg object is held 1.38 m above a relaxed, massless vertical spring with a force constant of 288 N/m. The object is dropped onto the spring. (a) How far does the object compress the spring? 1 m (b) Repeat part (a), but...