A 40.0-kg child swings in a swing supported by two chains,each 3.00 m long. The tension in each chain at the lowestpoint is 350 N. Find (a) the child’s speed at the lowest pointand (b) the force exerted by the seat on the child at the lowestpoint. (Ignore the mass of the seat.)

Q: A student is skateboarding down a ramp that is 6.95 m long and inclined at 24.1° with respect to the…

A:

Q: A 20 kg child sitting on a swing is pulled back to an angle of 50° off the vertical as shown in the…

A: The tension in the string can be calculated by analying free bdy diagram the tension at the lowest…

Q: A 1.70 kg box rests on a plank that is inclined ut an angle of 63.0° above the horizontal. The upper…

A: Given: mass the box, m=1.70 kg Force applied, F=16 N/m co-efficient of static friction, μs=0.26

Q: a student is skateboarding down a ramp that is 5.82 m long and inclined at 24.1% with respect to the…

A:

Q: A 60kg gymnast performs an iron cross. His wingspan is 63inches. The ring straps are attached 50cm…

A:

Q: light rope of length 1.40 m is attached to the ceiling. A small steel ball with mass 0.200 kg swings…

A: Given data: Length of the rope is, L= 1.40 m Mass of the ball is, m= 0.200 kg Maximum angle between…

Q: You are trying to slide a sofa across a horizontal floor. The mass of the sofa is 2.0 x 102kg, and…

A:

Q: In the figure, the pulley is ideal. M2 is 11.3 kg and the table has no friction. The blocks are…

A: Given that, initial velocity= 4 m/s  final velocity = 9 m/s  Distance moved = 7.26 m

Q: A 1,500-N crate is being pushed across a level floor at a constant speed by a force F of 370 N at an…

A: Given that, wt of crate W = 1500N  F =  370 N

Q: In the figure below, a block of mass 7.28 kg is pulled along a horizontal frictionless floor by a…

A: The free-body diagram,

Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.