Question

A train is moving with acceleration along a straight line with respect to ground. A person in a train finds that.

1 point

A) Newton’s second law is true but Newton’s I law is false

B) Newton’s I law is true but Newton’s II law is false

C) All the three Newton’s law are true

D) All the three Newton’s law are false.

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Answer 1

Answer:

From newton 2nd law we get F=ma, where m stand for mass and a stand for acceleration. If no force(F) is applied then F=0 so ma=0 as mass is not equal to zero so a=0 so a=

t

v−u

=0 so v=u=0 or v=u. If no force is applied then the body either in rest or in motion with uniform velocity in a straight line. it is Newton's 1st law.

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Answer 2

The train moves with acceleration along a straight line and in relation to the ground. A person on a train find  that Newton's three laws are false and that option (D) is correct.

Explanation:

Given: A train is moving with acceleration along a straight line with respect to the ground .

The train is in motion, the velocity is non-zero (V ≠ 0), while the acceleration is non-zero.

According to Newton's first law of motion, the train is moving, velocity is nonzero (V ≠ 0), while acceleration (A = 0) is  zero.

Then the train moves on with constant speed and in the same direction.In the absence of force, the body rests or moves in a straight line at a constant speed.

Therefore, Newton's first law of motion does not apply.

A train is moving with acceleration along a straight line with respect to the ground. That means  the acceleration  is remaining constant.

According to Newton's second law of motion, the force can change the acceleration of the object, and the acceleration and mass of the train are related.

Therefore, Newton's second law of motion does not apply.

A train is moving with acceleration along a straight line with respect to the ground.

According to Newton's third law of motion, for every action there is an equal and opposite reaction.

Therefore, Newton's third law of motion does not apply.

Thus,the train moves with acceleration along a straight line and in relation to the ground. A person on a train find  that Newton's three laws are false and that option (D) is correct.