Answer:
To protect you from fatal injuries and keep you secured in the case of an accident (my definition)
Explanation:
(Definition) Being buckled up during a crash helps keep you safe and secure inside your vehicle; being completely ejected from a vehicle is almost always deadly. If you don't wear your seat belt, you could be thrown into a rapidly opening frontal air bag. Such force could injure or even kill you.
it sinks into the liquid
(e.g. water sinks under oil as it is more dense)
Answer:
The position x, is ± 0.4 m.
Explanation:
The total mechanical energy of the oscillatory motion is given as;
When the kinetic energy (E) is half of the elastic potential energy (U);
Equate (1) and (2)
Thus, the position x, is ± 0.4 m.
Answer:
The answer is A.
Explanation:
The friction generated heat to release chemical energy because the same same thing happens with fluorescent and sodium vapor lamps; heat causes the (low-pressure) mercury/sodium vapor gas lamp to cause a lot of heat energy resulting in the same thing happening when you strike a match.
Answer:
The acceleration of the train is 5 m/s².
Explanation:
Acceleration is the change in velocity over a given time interval.
Therefore, acceleration is given as:
Where, 
are initial and final velocities and 
is the time interval.
Here, 
This gives,
Therefore, the acceleration of the train is 5 m/s².
