An empty shopping cart is pushed along a grocery store aisle at constant velocity. Find the carts weight and the friction force if the shopper produces a force of 40.0 Newton’s between the wheels and the floor, and the normal force on the cart is 105 Newton’s

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?