Question

Which has more momentum, a huge truck that is not moving or a small toy cart that is moving?

Answer 1

Answer:

Momentum is owned by a moving object. A large truck that doesn't move means it's at rest, so the speed is 0.

Answer 2

The small toy cart has greater momentum.

Let's see why !

Let's assume that the mass of the huge truck is M and mass of small toy cart is m.

Now, the truck is not moving, i.e. stationary. Hence, it's velocity is zero.

However, the toy cart is moving, so let the velocity be v.

So, linear momentum of huge truck:

$P_{truck}=M \times 0 = 0$

Now, linear momentum of you cart:

$P_{toy \: cart}=m \times v = mv$

Now, we can say:

$\boxed{P_{toy \: cart} > P_{truck}}$