Sunday

September 21, 2014

September 21, 2014

Posted by **Lui** on Wednesday, May 16, 2012 at 6:43pm.

- Momentum -
**Elena**, Thursday, May 17, 2012 at 6:55amm1 =4.4•10^-3 kg, m2 = 21.3•10^-3 kg, h =1.3 m, L= 2.4 m., v1 =?

m1 •v1 = (m1+m2) •v,

v= m1 •v1 /(m1 + m2) .

h =g•t²/2 => t = sqrt(2•h/g)

L= v•t = v• sqrt(2•h/g),

v =L/sqrt(2•h/g),

m1 •v1 /(m1 + m2) = L/sqrt(2•h/g).

v1= L•(m1 + m2)/m1• sqrt(2•h/g) =

= 2.4•(4.4•10^-3+21.3•10^-3)/( 4.4•10^-3)•sqrt(2•1.3/9.8) =

= 2.4•2.57•10^-2/(4.4•10^-3)•0.515 =27.22 m/s.

**Answer this Question**

**Related Questions**

Physics - 1. A bullet of 0.0500 kg is fired into a block of wood. Knowing that ...

PHYSICS - A 15g bullet is fired horizontally into a block of wood with a mass of...

Physics - A 4.3 g dart is fired into a block of wood with a mass of 22.6 g. The ...

Physics - A 4.3 g dart is fired into a block of wood with a mass of 22.6 g. The ...

Physics - A 4.5 g dart is fired into a block of wood with a mass of 23.8 g. The ...

physics - A gun is fired vertically into a 1.55 kg block of wood at rest ...

physics - A 25 g bullet is fired from a gun into a 1.35 kg block of wood ...

physiscs - a 15g bullet is fired horizontally into a block of wood with mass 2.5...

physics - a bullet of mass 0.06kg is fired into a block of wood. if the bullet ...

Physics - A bullet with a mass of 0.01kg is fired horizontally into a block of ...