A shopper pushes a grocery cart for a distance of 19.5 m at constant speed on level ground against a 47.5 N frictional force. The shopper pushes in a direction 25.5° below the horizontal. What is the force applied by the shopper to overcome the frictional force?
a) 47.5 N
b) 60.2 N
c) 52.8 N
d) 70.1 N