A force of 4,5 N is applied to toy car with a mass 250g, moving on the tarred road with velocity of 5 minutes per second towards the East, it joins a tilled road and start to move at a velocity of 8 minutes per second in the same direction (east).Calculate it's change in momentum

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)