Friday

April 17, 2015

April 17, 2015

Posted by **Katie** on Sunday, January 31, 2010 at 2:11pm.

For the position vector I got:

-7.16sin(omega*t)i+4.00-7.16cos(omega*t)j

For the velocity vector I got:

-7.16*omega*cos(omega*t)i+7.16*omega*sin(omega*t)j

For the acceleration vecotr I got:

7.16*omega^2*sin(omega*ti)+7.16*omega^2*sin(omega*t)j

I this correct or not? My homework is computer based and when I type this in, it marks it wrong. Please help.

- college Physics -
**bobpursley**, Sunday, January 31, 2010 at 2:19pmThe only two things I see wrong is you have on acceleration the unit vector i inside the argument of the sin function, and on the lst part of the acceleration vector, you should have COSINE, not sine

- college Physics -
**Damon**, Sunday, January 31, 2010 at 2:24pmOne error

For the acceleration vector I got:

7.16*omega^2*sin(omega*ti)+7.16*omega^2*__________sin(omega*t)______j

should be

For the acceleration vector I got:

7.16*omega^2*sin(omega*ti)+7.16*omega^2*cos(omega*t)j

Note that

acceleration = - omega^2 *( sin and cos components of displacement)

**Answer this Question**

**Related Questions**

physics - The coordinates of an object moving in the xy plane vary with time ...

maths - Choose the option that gives an expression for the indefinite integral...

MATH - Solve the following equations for x where 0 ≤ x < 2π. tan(x...

Trig - 4. Asked to simplify the expression sin(180−è), Rory volunteered ...

physics - Four charges −8 × 10^−9 C at (0 m, 0 m), −7 × 10^&#...

biology - Given the part of the molecule shown below, can the underlined atom ...

calculus - Find an equation for the surface consisting of all points P(x, y, z) ...

Math Trig - 13. What is the equation of a cosine function with amplitude 3, ...

Pre Calculus - Use one of the identities cos(t + 2ðk) = cos t or sin(t + 2ðk) = ...

Pre Calculus - Use one of the identities cos(t + 2ðk) = cos t or sin(t + 2ðk) = ...