###### Asked in Physics

Physics

# When velocity is negative and accelerative is negative what happens to an object's motion?

## Answer

###### Wiki User

###### November 25, 2008 4:35PM

When velocity is negative and accelerative is negative the the object's motion is speeding up.

## Related Questions

###### Asked in Physics, Science

### What happens to momentum when two objects collide?

Objects Sticking Together
Sometimes, objects stick together after a collision. The
football players shown in Figure 3 are an example of such a
collision. A dog leaping and catching a ball and a teen jumping on
a skateboard are also examples. After two objects stick together,
they move as one object. The mass of the combined objects is equal
to the masses of the two objects added together. In a head-on
collision, the combined objects move in the direction of the object
that had the greater momentum before the collision. But together,
the objects have a velocity that differs from the velocity of
either object before the collision. The objects have a different
velocity because momentum is conserved and depends on mass and
velocity. So, when mass changes, the velocity must change, too.
Figure 3 Examples of Conservation of Momentum

###### Asked in Physics

### Why two objects move in opposite direction one will have positive momentum and other negative momentum?

Quite simply, this means that momentum is a vector quantity; the
direction is relevant. This is useful, for example, for
calculations involving the conservation of momentum. Actually
momentum is the product of velocity and mass, and velocity is also
a vector quantity - thus, in this example, one object will have a
positive velocity (more precisely: a positive component of the
velocity along the x-axis, for example), the other, negative.
Multiplying this velocity by the mass will also give a quantity
which may be positive or negative (or rather, have positive or
negative components).