Friday

August 29, 2014

August 29, 2014

Posted by **Jane** on Saturday, September 8, 2012 at 12:13am.

Find the average speed of the particle in the first 7 seconds

- Physics -
**Henry**, Sunday, September 9, 2012 at 4:05pm= t^3 - 6t^2 - 15t - 5.

Xo=0^3 - 6*0 - 15*0 - 5 = -5 cm @ t = 0.

X=7^3 - 6*7^2 - 15*7 - 5 = -61 cm @ 7s.

V = D/t = (X-Xo)/t.

V = D/t = (-61-(-5)) / 7 = 56 / 7=-8cm/s

**Related Questions**

kinematics - these are two similar kinematics maths question which i dont know. ...

Mathematics - a particle moves in a straight line such that its position x from ...

maths urgent please - a particle moves in a straight line such that its position...

calculus - a particle moves along a number line measured in cm so that its ...

math - For 4.95 seconds , a particle moves in a straight line according to the ...

math - For 4.95 seconds , a particle moves in a straight line according to the ...

Calculus - The position of a particle moving on a horizontal line is given by s(...

Calculus - A particle moves in a straight line under a force such that its ...

calculus - A particle moves in a straight line under a force such that its ...

math(mechanics) - the acceleration of a particle as it moves along a straight ...