Wednesday

July 23, 2014

July 23, 2014

Posted by **emmie** on Tuesday, May 8, 2012 at 1:20pm.

Part a) Use Newton's second law to find the snowboarder's acceleration while on the incline and while on the flat surface.

part b)Then use these accelerations to determine x .

- physics -
**Elena**, Tuesday, May 8, 2012 at 2:05pmm =75 kg, vₒ=5 m/s, s = 110 m,

k1 = 0.18, k2 = 0.15.

a1=? a2=?, x =?

The equations of the motion along the incline are

x: m•a1 = m•g•sinα – F1(fr),

y: 0 = - m•g•cosα + N.

F1(fr) = k1•N=k1•m•g•cos α,

m•a1 = m•g•sinα – k1•m•g•cos α,

a1 = g• (sinα - k1•cos α) = 9.8•(0.469 – 0.18•0.883) = 3.04 m/s².

v=vₒ +a1•t,

s =vₒ•t + a1•t²/2 .

v = sqrt(2•a1•s +vₒ²) = sqrt(2•3.04•110 + 25) = 26.33 m/s.

The motion along a flat surface:

m•a2 = F2(fr) = k2•m•g,

a2 = k2•g = 0.15•9.8 = 1.47 m/s².

x = v²/2•a2 = (26.33)²/2•1.47 = 235 m.

**Related Questions**

Physics - The coefficient of static friction between the 3.00 -kg crate and the ...

Physics - A crate begins sliding down a frictionless incline of 25.0o. If the ...

PHYSICS - A 50 kg block is on a 30 degree incline. The coefficient of friction ...

physics - A 50 kg block is on a 30 degree incline. The coefficient of friction ...

Physics(Please help) - 1) A box is sliding up an incline that makes an angle of ...

physics - A crate weighs 820N and rests on a 34degree incline. You can keep it ...

Physics - The coefficient of static friction between the 3.00 kg crate and the ...

★!!!PhYsIcS!!!★ - A 50 kg block is on a 30 degree incline. The ...

physics - A block is released from rest at the top of an incline which makes a ...

Physics - A block is released from rest at the top of an incline which makes a ...