A new sprint track is being designed for competitions. If the 17 m radius curves are being designed to be perfectly banked for a runner pacing herself at 18 km/hr, at what angle should the track curves be banked

f=600 N

The frictional force will be equal to applied force in order to move cabinet at constant velocity.

Explanation:

According to Newton's Second Law of motion:

∑F=ma

where:

m is the mass

a is the acceleration

In our case Cabinet will move with constant velocity it means acceleration a=0

∑F=0

F-f=0

where:

F is the applied force

f is the frictional force in opposite direction of applied force (F).

600-f=0

f=600 N

The frictional force will be equal to applied force in order to move cabinet at constant velocity.