Recent content by ppxrare

but its not perpendicular? one acceleration is upwards and the other is downwards ? they should cancel each other out?

so the magniture should be 7.25 downwards as I said 9.8-2.25 , but it was wrong Can you please give me the answer because I'm getting confused , I said one thing and you replied that it is wrong then you give me a tip telling me to do the same thing I did at the start. Thanks a lot for the...

hmm but that's not an option in webassign , they want an answer in m/s2 at a degree to the south from the vertical I need the degree

I still got a) for question 1 wrong, the acceleration and direction :( , can you please give me the answer as I know acceleration is a vector... but I did 9.8 - 2.55 and I still got the wrong answer, and what was the angle to the south from the vertical?

Halls of Ivy, thanks a lot I got question 3 correct and I understood 2, as for 1) what will I choose for the direction for a) ?

A bolt drops from the ceiling of a train car that is accelerating northward at a rate of 2.55 m/s2. (a) What is the acceleration of the bolt relative to the train car? (they also want the angle to the south from the vertical) (b) What is the acceleration of the bolt relative to the Earth...

thanks a lot man, I got it correct. Would appreciate some more help in another thread:P

ok so far this is what I have thought of, delta y = 0.88m final y velocity is 0 (top of arc) and acceleration is -9.81 I used these two equations delta y = Viyt -9.81t^2 Vyf= Vyi + at I substituted for Viy but I got the time negative what am I doing wrong?

how do I calculate the time though? I don't think I have enough information as I don't have initial velocity

Homework Statement A basketball star covers 2.40 m horizontally in a jump to dunk the ball (see figure). His motion through space can be modeled precisely as that of a particle at his center of mass. His center of mass is at elevation 1.02 m when he leaves the floor. It reaches a maximum...