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July 30, 2014

July 30, 2014

Posted by **Isis** on Monday, February 25, 2013 at 6:01pm.

2) A cart of mass 1 kg moving at a speed of 0.5 m/s collides elastically with a cart of mass kg at rest. The speed of the second mass after the collision is 0.667 m/s. What is the speed 1 kg mass after the collision?

3) A 0.010 kg bullet is shot from a 0.500 kg gun at a speed of 230 m/s. Find the speed of the gun.

4)Two carts with a masses of 4 kg and 3 kg move toward each other on a frictionless track with speeds of 5.0 m/s and 4 kg m/s respectively. The carts stick together after the colliding head on. Find the final speed.

5) A cart of mass 1.5 kg moving at a speed of 1.2 m/s collides elastically with a cart of mass 1.0 kg moving at a speed of 0.75 m/s. (the carts are moving at the same direction)The speed

of the second mass (1.0 kg) after the collision is 0.85 m/s. What is the speed

of the 1.5 kg mass after the collision?

please help me!

>>FORMULA's<<

W=Fd

F=ma

W=mad

J=Ft or J=p

Ft=mvf-mvi

P=w/t

P=energy/time

P=mad/t

P= Fd/t

Ft=mvf-mvi

please please!!!

- Physics ~really need help!~ -
**Elena**, Monday, February 25, 2013 at 6:22pm2.

v₁= {-2m₂v₂₀ +(m₁-m₂)v₁₀}/(m₁+m₂)=

=(m₁-m₂)v₁₀/(m₁+m₂)=

v₂={ 2m₁v₁₀ - (m₂-m₁)v₂₀}/(m₁+m₂)=

= 2m₁v₁₀ /(m₁+m₂)=

3.

0= m₁v₁-m₂v₂=>

v₂=0.01•230/0.5=

4.

m₁v₁-m₂v₂=(m₁+m₂)u =>

u= (m₁v₁-m₂v₂)/(m₁+m₂)

5.

When the balls are moving in the same direction

v₁= {+2m₂v₂₀ +(m₁-m₂)v₁₀}/(m₁+m₂)

v₂={ 2m₁v₁₀ + (m₂-m₁)v₂₀}/(m₁+m₂)

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