Question

Explain what causes the object to travel faster on a curvilinear path?What other factors may affect the speed of the car?

Answer 1

In a curvilinear path the centripetal force act on the body and causes the car to travel faster along its trajectory
The factors that affect the speed of a moving car are as follows:
Acceleration due to gravity
Mass of the car 
The effect of the environment like wind etc
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Answer 2

The centripetal acceleration determines how fast or slow the object travels on a curvilinear path.

Other factors that affect the speed of the car are:

# Radius of the curve. This is indirectly proportional to the centripetal acceleration applied. If the curve is small, the centripetal acceleration that must be applied increases and vice versa.

# Direction of the wind. If the wind blows in the direction opposite to the car’s movement, then the speed of the car reduces.

# The weight of the vehicle. This also plays an important role in deciding the speed with which the car can move on a curvilinear path.