In this lesson, we will learn how to solve problems using Newton's second law.

Q1:

A balloon of mass 1β086 kg was ascending vertically at 36 cm/s. If a body of mass 181 kg fell from it, find the distance between the balloon and the body 11 seconds after the body fell. Take π = 9 . 8 / m s 2 .

Q2:

A balloon of mass π 1 kg carrying a body of mass π 2 kg was moving vertically upwards with an acceleration of 1 1 2 π . The body fell from the balloon, and the balloon started moving with an acceleration of 1 4 π . Given that the lift force of the balloon and the resistance to its motion are constant in both cases, determine π 2 β:β π 1 . Take π = 9 . 8 / m s 2 .

Q3:

A train, weighing 136 metric tons, was moving along a horizontal straight railroad with a uniform velocity of 14.7 m/s. While the train was moving, the last carriage, weighing 17 metric tons, was separated and decelerated to completely stop after 80 seconds. If the resistance per metric ton of the trainβs mass was constant, determine how many seconds it took for the distance between the train and the separated carriage to be 42 m.

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