2. A car of mass 1.1 x 10kg negotiates a level curve at a constant speed of 22 m/s. The
curve has a radius of 85 m.
(a) Draw an FBD of the car and name the force
that provides the centripetal acceleration.
(b) Determine the magnitude of the force named
in part (a) that must be exerted to keep the car
from skidding sideways.
(c) Determine the minimum coefficient of static
friction needed to keep the car on the road.

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600