» » » A 500kg truck moving with a velocity of 6m/s collides with a stationary 100kg car...

# A 500kg truck moving with a velocity of 6m/s collides with a stationary 100kg car...

### Question

A 500kg truck moving with a velocity of 6m/s collides with a stationary 100kg car. The truck and the car move together after collision. What is their common velocity?

A)
5m/s
B)
10m/s
C)
30m/s
D)
1m/s

### Explanation:

Mass of truck, m¹=500kg
Velocity of truck, v¹=6m/s
Mass of car, m²=100kg
Velocity of car, v²=0m/s
m¹v¹+m²v²=(m¹+m²)V
Where V is the common velocity after collision
(500*6)+(100*0)=(500+100)V
3000+0=600V
V=$$\cfrac{3000}{600}$$
V=5m/s

## Dicussion (1)

• Mass of truck, m¹=500kg
Velocity of truck, v¹=6m/s
Mass of car, m²=100kg
Velocity of car, v²=0m/s
m¹v¹+m²v²=(m¹+m²)V
Where V is the common velocity after collision
(500*6)+(100*0)=(500+100)V
3000+0=600V
V=$$\cfrac{3000}{600}$$
V=5m/s