Final answer:
Light acceleration pressure leads to slow forward motion of a vehicle by causing a gradual increase in speed. In the case of a rocket, Newton's third law explains that the expulsion of gas downwards propels the rocket upwards. Option 1 is correct.
Step-by-step explanation:
Light acceleration pressure in the context of a vehicle allows for a slow forward motion of the vehicle. Acceleration is the rate of change of velocity over time, and when acceleration is applied gently, such as lightly pressing the gas pedal, it results in a gradual increase in the velocity of the vehicle, leading to a slow and controlled forward movement.
In the scenario of a rocket, Newton's third law states that for every action there is an equal and opposite reaction; thus, when a rocket expels gas downwards, the rocket is propelled upwards due to the reaction force.
Check Your Understanding
An object can accelerate in three ways: by speeding up, by slowing down, or by changing direction. It is important to understand that acceleration is not always in the direction of motion; if the acceleration is in the same direction as the motion, the object speeds up, and if it is in the opposite direction, the object slows down.
Additionally, changes in environmental conditions such as oil or gasoline on the road surface, can affect the control of a car. A light rain can make the road slippery, reducing traction, and hence affecting the car's ability to accelerate smoothly. A heavy rain might wash away some of the slippery substances, but it also creates other risks such as hydroplaning.