A0.2 kg plastic cart and a 20 kg lead cart both roll without friction on a horizontal surface. equal forces are used to push both carts forward for a time of 1 s, starting from rest. is the momentum of the plastic cart greater than, less than, or equal to the momentum of the lead cart?

The same

Explanation:

The change in momentum of each cart is equal to the impulse given by the force applied on the cart:

where

F is the force applied

is the time during which the force is applied

The force applied to both carts (F) is the same, as well as the time (). This means that the change in momentum, , is the same for both carts. But both carts start from rest (momentum = 0): this means that at the end, both carts will have exactly same momentum.