newtons-laws-v3.pdf - Exercises on Newton’s Laws of Motion Problems created by Raditya 1 A pendulum is hanging on a ceiling of a plane which is

# newtons-laws-v3.pdf - Exercises on Newton’s Laws of...

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Exercises on Newton’s Laws of Motion Problems created by: Raditya 1. A pendulum is hanging on a ceiling of a plane which is initially at rest. When the plane prepares to take off, it accelerates with a constant acceleration until its speed reaches 30 m/s. It is known that during this period, the pendulum makes an angle 45 o with respect to vertical line. Find the distance traveled by the plane until it takes off. [Answer: x = 45 . 92 m] 2. A block of mass m is at rest on a rough surface which makes an angle θ with respect to horizontal. The coefficient of static friction is μ s , but it is too small for the friction alone to be able to prevent the block from sliding down. If an external force F is to be applied to the block, as shown below, find its range of values in order to keep the block in equilibrium. 3. Look at the figure below, There is no friction between block C and the ground, but there is friction between block C and D. Also, assume that all the strings are massless and frictionless. Find the minimum coefficient of static friction between block C and D such that all the blocks move with the same acceleration. [Answer: μ s , min = ( m B + m C ) m A +( m A + m D ) m B m D ( m A + m B + m C + m D ) ] 4. Look at the figure below, 1

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Assume that m B > m A and that the pulley is massless. There is no friction between block B and the ground as well as
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