When two people push the cart, then it will move with a faster speed.
According to Newton's third law of motion, for every action there is an equal and opposite reaction.
When we push the cart, our action of pushing causes the reaction of the cart moving with the same force as that of our push in the opposite direction.
If only the boy pushes the cart, then there will be a smaller force of push and hence the cart will move slowly. When two people will push the cart, the force will be larger and as a result the cart will move at a faster speed.
To learn more about cart, click here:
https://brainly.com/question/23064388
#SPJ4