Two trains A and B of length 400m each are moving on two parallel tracks with a uniform speed of 72km/h in the same direction, with A ahead of B. The driver of B decides to overtake A and accelerates by 1m/s. If after 50s, the guard of B just brushes past the driver of A, what is the original distance between them?

Laws of Motion topics include: Forces, gravity and its effects, friction and forces and motion in a plane. Newton's laws of motion are: First law: An object will not change its motion unless a force acts on it. This is also known as the law of inertia. Second law: The force on an object is equal to its mass times its acceleration. Third law: For every action, there is an equal and opposite reaction. This is also known as the law of action and reaction.  Newton's laws of motion can help us understand how things move. For example, the second law explains why it takes less force to move a... Show more

Laws of Motion topics include: Forces, gravity and its effects, friction and forces and motion in a plane.

Newton's laws of motion are:
First law: An object will not change its motion unless a force acts on it. This is also known as the law of inertia.
Second law: The force on an object is equal to its mass times its acceleration.
Third law: For every action, there is an equal and opposite reaction. This is also known as the law of action and reaction. 

Newton's laws of motion can help us understand how things move. For example, the second law explains why it takes less force to move a bike forward than a car. The third law explains why a ball bounces when thrown against a wall. 

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