Question

When is a vehicle considered to be parked?

1) When the driver leaves the vehicle
2) When the vehicle has been stopped for longer than a specified time
3) When the vehicle is turned off
4) When the vehicle is locked

Answer 1

A vehicle is considered parked when it is stationary with the expectation of being left for some time. For the truck in the question, physics principles will apply to its movement as it rolls down the hill.

Step-by-step explanation:

A vehicle is generally considered to be parked when it has been brought to a complete stop and the intention is to leave it stationary for some time, regardless of whether the driver leaves the vehicle, the vehicle is turned off, or it is locked. Factors such as local laws might offer additional definitions or stipulations about what constitutes 'parking'.

In the context of the question that involves a truck of mass 1.2 tons parked at the top of a hill, 150 m high, and then rolling freely down the hill, specific physics concepts such as gravitational potential energy, kinetic energy, and work-energy principles will be relevant to analyze the motion of the truck as it descends the hill.