an old rope can only safely suspend 120 kg. The old rope losses 20 kg of holding strength per minute once it’s under tension from any thing over 80 kg. When the rope is tied to a beam, it  hangs down with a vertical length of 12.0 m.  Calculate the minimum time required for a 85 kg person starting from rest to climb the  entire length of the rope without breaking it.

Q: A chain hangs over a smooth peg, 8 meters being on one side and 12 meters on the er. Find the time…

A: Let total length = L  Let mass per unit length = u  Let y (t) is the length on heavier side Length…

Q: A vertical wall cannot exert a normal force. O True O False

A: A vertical wall can exert a normal force.

Q: (a) An 11.0 kg salami is supported by a cord that runs to a spring scale, which is supported by a…

A: It is given that,

Q: There is a mass of 10 kg which is placed on an inclined plane making an angle of 30° with the…

A:

Q: A (cord tensions) Ста 40° B (no friction MK = 0.35 мк с = 4 lb W₁ = 4 16 B W = 16 16 Three blocks…

A:

Q: In building a house, carpenters use nails from a large box. The box is suspended from a spring twice…

A: At the instant the springs are stretched completely the nails will be in equilibrium. Therefore, the…

Q: The coefficient of kinetic friction between a box and the floor is H = 0.16 and the coefficient of…

A: Given data The coefficient of kinetic friction is given as μk=0.16. The coefficient of static…

Q: When landing from a jump, Andy applied an average vertical force of -2500 N to the ground in order…

A: Given: Average vertical force, F=-2500 N Weight, W=-760 N Mass, m=77.5 kg Formula: Newton's Second…

Q: An inextensible cable of negligible mass is used to drag a log on a rough horizontal surface. The…

A: As per the question, we can formulate an FBD to solve it easily:

Q: m A block with mass m is at rest on a rough inclined plane and is connected to an object with the…

A:

Q: passenger is standing on a scale in an elevator. The building has a height of 500 feet, the…

A: Elevator descends with  U= 0m/s ,t = 6sec , V= 12m/s

Q: 3. The force F required to move a box by pulling on an attached rope that forms an angle w with the…

A: a)Force required to move the box of mass m is,

Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: