Middle schoolphysics 20 points how much force would you need to use in order to accelerate an 80k shopping cart to 0.2 m/s^2 (f=ma)

Plss anybody know how to do this? ? i need the answers from a through d

You are given two vectors a⃗ =−3.00ι^ 5.00j^ and b⃗ =5.00ι^ 2.00j^. let the counterclockwise angles be positive.

Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.