In about 1915, Henry Sincosky of Philadelphia suspended himself from a rafter by gripping the rafter with the thumb of each hand on one side and the fingers on the opposite side. Sincosky’s mass was 79 kg. If the coefficient of static friction between hand and rafter was 0.70, what was the least magnitude of the normal force on the rafter from each thumb or opposite fingers? (After suspending himself, Sincosky chinned himself on the rafter and then moved hand-over-hand along the rafter. If you do not think Sincosky’s grip was remarkable, try to repeat his stunt.)

Q: A 5 kg box rests on a tabletop. On one side, it compresses a spring with a stiffness of 1000 N/m by…

A: mass of box (m) = 5 kg spring constant (k) = 1000 N/m compression (d) = 1 cm = 0.01 cm

Q: A woman holds a book by placing it between her hands such that she presses at right angles to the…

A: The Static friction is given by the formula with respect to the force is given as, Fs≤μsFN The…

Q: A rug (mass of 20.0 kg) is sitting on a slope with an angle of 20 degrees. A person (mass of 40.0…

A:

Q: You are holding a book of mass 10.7 kg that is initially at rest against a vertical wall by exerting…

A: Given,Mass, m = 10.7 kgFYb = 100.8 Nμs = 0.46μk =0.36

Q: A worker with mass m = 70 kg is trying to stretch his muscles with the help of a vertical wall.…

A: Given,  Mass, m = 70 Kg Force exerted by each hand on the wall is F = 70 N Total force exerted on…

Q: A crate that weighs w = 110 N is located on a rough surface. When a force Fapplied = 40 N is exerted…

A: As per guidelines only 3 subparts are solved here. Given, Weight, W = 110 N Fapplied = 40 N

Q: A teenager of mass m1=50.6kgm1=50.6kg pushes backward against the ground with his foot as he rides…

A:

Q: A circus gymnast hangs from two ropes attached to the ceiling while lowering himself to the floor at…

A: Given: The angle of the first rope with vertical is 28.3°. The tension in the first rope is 352 N.…

Q: A ladder of length L and mass m leans against the side of a house, making an angle of θ� with the…

A:

Q: A block of mass m - 5.00 kg is put on top of a block of mass m, -5.00 kg. To cause the top block to…

A:

Q: The Johnsons just received a heavy package (perhaps a treadmill) in the mail that they ordered from…

A:

Q: In the figure, a 50 kg rock climber is climbing a “chimney” between two rock slabs. The coefficient…

A: mass of the rock climber m=50kgcoefficient of static friction let N1 and N2 be the normal force by…

Q: A woman exerts a horizontal force of 109 N on a crate with a mass of 38.7 kg.   (a) If the crate…

A: Here, the free body diagram shows the horizontal force as FH  and  fs is the static friction, N is…

Q: A 3 kg box rests on a horizontal table. It is attached to a 2 kg box via a pulley. The 2 kg box…

A:

Q: The weight of the block in the drawing is 62.0 N. The coefficient of static friction between the…

A: Weight of the block, W=62.0 N Coefficient of static friction, μs=0.440 Consider the following…

Q: A crate with a mass of m=254kg rests on the horizontal deck of a ship. The coefficient of static…

A: The objective of the question is to find the minimum force required to get the block moving from…

Q: Two boxes, one with a mass of M = 17.0 [kg] and the other with a mass of m = 3.00 [kg], are stacked…

A: Mass of the bigger box, M=17.0 Kg Mass of the smaller box, m=3.00 kg Angle of the inclined plane,…

Q: A block weighing 60 N is resting on a flat surface where the coefficient of static friction is 0.55,…

A:

Q: A block of mass m, = 4.00 kg is put on top of a block of mass m, = 5.00 kg. To cause the top block…

A: Here we have to use some basic concept.

Q: A block of mass m = 19.5 kg rests on an inclined plane with a coefficient of static friction of μs =…

A:

Q: The Johnsons just received a heavy package (perhaps a treadmill) in the mail that they ordered from…

A:

Q: A tool box of weighing 50.0 N rests on a horizontal surface. The coefficient of static friction…

A: A box , weight = 50 N Coefficient of static friction = 0.40 Coefficient of Kinetic friction = 0.20…

Q: A 1.00 × 103-N crate is being pushed across a level floor at a constant speed by a force → F of…

A:

Q: A 2.30 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude…

A: Apply the force equilibrium condition along the vertical, and determine the normal reaction force as…

Q: The Johnsons just received a heavy package (perhaps a treadmill) in the mail that they ordered from…

A:

Q: A person stands on the ball of one foot. The normal force due to the ground pushing up on the ball…

A: Given Data:-  The Normal force due to the ground pushing up on the ball of the foot N = 750 N  The…

Q: An object sitting at rest on a level surface has a weight and a normal force of 200 N. The…

A:

Q: placed on a ramp. The ramp has an incline of ? = 25.7 degrees from the horizontal. The static…

A:

Q: One block rests upon a horizontal surface. A second identical block rests upon the first one. The…

A:

Q: A desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a…

A:

Q: A block of mass m1 = 3.9 kg is placed on top of a block with mass m2 = 5.4 kg. A force, F = is…

A:

Q: Force T pulls at angle a up from the horizontal on a section of pipe of weight W as shown, but the…

A: Draw the free body diagram.

Q: A block is placed on a wooden plank, which is initially horizontal. One end of the plank is slowly…

A:

Q: A pulley is attached to one end of a rough plank, which makes an angle of 34° with the horizontal. A…

A: Angle of inclination, θ=34° mass of the Box, mA mass of the bucket filled with water, mB=7.5 Kg…

Q: A block with a mass of 9.32 kg is placed on a ramp. The ramp has an incline of ? = 20.2 degrees from…

A:

Q: A block of mass m; = 4.00 kg is put on top of a block of mass m, = 7.00 kg. To cause the top block…

A:

Q: A block is resting on a wooden plank. There is a hinge on one end of the plank which allows the…

A: The angle of repose if given by  where, is the coefficient of friction.

Q: A 16 kg block of steel is at rest on a horizontal table. The coefficient of static friction between…

A:

Q: A worker pulls a 15-kg crate in a straight line on a level surface by imparting a horizontal tension…

A:

Q: A block of mass m; = 4.0 kg is put on top of a block of mass mp = 7.0 kg. To cause the top block to…

A: Since 19 N force must be applied to slip top block so frictional force between the two blocks must…

Q: A book of mass 9 kg rests on a plank. You tilt one end of the plank and slowly increase the angle of…

A: Given data: -  The mass of the book is m = 9 kg. The coefficient of static friction between the…

Q: A

A:

Q: A block of mass m t = 4.0 kg is put on top of a block of mass m b = 5.0 kg. To cause the top block…

A: Let FH be the horizontal force applied on the top block.Consider the top block FBD.

Q: A 2.60 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 7.29…

A:

Q: A woman exerts a horizontal force of 145 N on a crate with a mass of 38.7kg. (a) If the crate…

A:

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: