Question

A car is parked on a steep hill. Identify the forces on the car.

Short answer

frictional force, gravitational force, and reaction force

Step-by-step solution

Step 1.Given Information 

in question given the some situation of car if it is parking on the steep hill which force apply on it.

Step 2

force is which apply to object as push or pull to for given some movement to object.

here there are different forces present on earth like gravitational, frictional, normal ,Tension, applied and string.

but here applied force on the car is friction force so only focus on friction force

Friction force

Friction force is the force where object moves across it or take some effort to move from it.

there are two different type of friction forces sliding and static. but always not same case sometime, it is also opposes the motion of an object.

Here the frictional force is opposes the motion of car.

Step 3

free body diagram of car parked at hill

When an object moves along an inclined plane in an upward direction, the friction force acts on the object in a downward direction between the plane and the object.

from diagram there are three forces acting on the car normal, frictional and gravitational but here the possible to car parked on the hill because of the there is friction force between road and car tyres.