# Search results

1. ### What is the paper's speed relative to the ground?

do u mean [5,0] and [0,16] because i used vectors and i got the angle of 72.6 deg. and that was wrong
2. ### Find an expression for the acceleration

oh ok.. so i redid it and i got m2 y: 2T-m_2*g=m_2*a_2 since T= m_1*a_1 i subsituted that it and solved for a_1 and got a_1= (2*m_2*g)/(4m_1+m_2) is this right?
3. ### What is the paper's speed relative to the ground?

The paper delivery boy tries to throw the paper into your narrow driveway without slowing down. His pickup truck travels at 5.00 mph, and he throws the paper at 16.0 mph just as the truck passes the driveway. in what direction should he throw the paper in order for it to land in the driveway...
4. ### Find an expression for the acceleration

x m_1: T=m_1*a_1 y m_2: T-m_2*g=m_2*a_2 2(m_1*a_1)*g=m_2*a_2 a_2= a_1/2 2 (m_1*a_1)*g=m_2*(a_1/2)
5. ### Find an expression for the acceleration

oh that's right, it never did say anything about it being frictionless, maybe that's what i did wrong. and there was no other information about the masses standing still
6. ### Find an expression for the acceleration

In the figure, find an expression for the acceleration of m_1 i don't understand why (-m_2*g)/(((-m_2)/2)-m_1) isn't right because the a of mass#2 is (-a_1)/2 right?
7. ### Tension prob

yepp yepp i had to use sin to get it right so my final equation did turn out to be 2Tsin(8)=F+Fg and that worked. Thanks! =]
8. ### Tension prob

is this right? x: Tsin(theta)-Tsin(theta) y: 2Tcos(8)=F+Fg
9. ### Tension prob

A 68.0 Kg tightrope walker stands at the center of a rope. The rope supports are 10 m apart and the rope sags 8.00 degrees at each end. The tightrope walker crouches down, then leaps straight up with an acceleration of 8.10 m/s^2 to catch a passing trapeze. What is the tension in the rope as...
10. ### Frictionless Force question

yay i got it right thankkk you Y: Fn= (m1*g)/cos(theta) X: (m1*g*tan(theta))/m1 = a system: F= (m1+m2) ((m1*g*tan(theta))/m1 ) =]
11. ### Frictionless Force question

thanks i tried what you told me too and i think i still might have done it wrong? f(block1)y: Fn-Fgcos(theta)=0 F(block1)x: Fgsin(theta)=m1a Fgsin(theta)/m1= a system x: F= (m1+m2) ((m1g*sin(theta)/m1) and they said my answer was wrong because it doesn't depend on theta...
12. ### Frictionless Force question

Find an expression for the magnitude of the horizontal force F in the figure for which m1 does not slip either up or down along the wedge. All surfaces are frictionless. since it has nothing to do with the friction i am thinking that m1 and the force have to have the same acceleration in the...
13. ### Car travels with fwd force help!

i don't know that's exactly what i did and handed to my prof and my answers were right =] haha so i don't know at least its right? =] thanks though
14. ### Car travels with fwd force help!

o man lol i made it SO much harder then it really was. lol well for anyone else struggling EVER with this problem like EVERYONE else said there are two components to the acceleration in this problem. a= sqrt( a(radial) + a(tangetial) ) the tangential is given by the foward force. Which is...
15. ### Car travels with fwd force help!

can someone let me know if I am getting close to the right answer? so far i have forces in the y= Fn-Fg=ma=0 Fn=Fg forces in the x= F(foward)-F(friction)=ma=mv^2/r 1000N-(u(static)*F(normal))=1900v^2/20 to finish the problem i solve for V and then divide...
16. ### 2 Balls on inclined plane problem

do u mean planes of the same length?
17. ### Car travels with fwd force help!

A 1900 kg car starts from rest and drives around a flat 40.0 m diameter circular track. The forward force provided by the car's drive wheels is a constant 1000N . What are the magnitude of the car's acceleration at t= 10.0s ? If the car has rubber tires and the track is concrete, at what...