A 23.0-kg child on a 4.00-m-long swing is released from rest when the ropes of the...

A 23.0-kg child on a 4.00-m-long swing is released from rest when the ropes of the swing make an angle of 25.0° with the vertical. (a) Neglecting friction, find the child's speed at the lowest position. m/s (b) If the actual speed of the child at the lowest position is 2.40 m/s, what is the mechanical energy lost due to friction? J

Expert Solution

genius_generous answered 7 months ago

A 31.0-kg child on a 3.00-m-long swing is released from rest when the ropes of the...

A 31.0-kg child on a 3.00-m-long swing is released from rest when the ropes of the swing make an angle of 31.0° with the vertical. (a) Neglecting friction, find the child's speed at the lowest position. (b) If the actual speed of the child at the lowest position is 2.50 m/s, what is the mechanical energy lost due to friction?

a 0.5 long pendulum with a mass of 2 kg is released from rest at an...

a 0.5 long pendulum with a mass of 2 kg is released from rest at an angle of 20 degrees. Find: D. The arc length of the amplitude E. The maximum velocity at the bottom F. The maximum acceleration G. The period of oscillation H. The frequency of oscillation I. The angular frequency of oscillation J. The maximum tension in the string

A 35.0-kg child swings in a swing supported by two chains, each 2.92 m long. The...

A 35.0-kg child swings in a swing supported by two chains, each 2.92 m long. The tension in each chain at the lowest point is 342N. (a) Find the child's speed at the lowest point. m/s (b) Find the force exerted by the seat on the child at the lowest point. (Ignore the mass of the seat.) N (upward)

A block of mass m = 3.50 kg is released from rest from point A and...

A block of mass m = 3.50 kg is released from rest from point A and slides on the frictionless track shown in the figure below. (Let ha = 5.20 m.) (a) Determine the block's speed at points B and C vB = m/s vC = m/s (b) Determine the net work done by the gravitational force on the block as it moves from point A to point C. J

A child is on a rope swing. When the child and swing are at their highest...

A child is on a rope swing. When the child and swing are at their highest point, the rope makes an angle of 30 degrees with the vertical. The rope is 4.17m long. What is the child's speed when the rope makes an angle of 20 degrees with the vertical? Give your answer in meters per second.

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1.) In the figure, a block of mass m = 13 kg is released from rest...

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An object of mass 2 kg is released from rest from a platform 30 m above...

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A 0.985 kg yo-yo with an average radius of 0.0610 m is released from rest and...

A 0.985 kg yo-yo with an average radius of 0.0610 m is released from rest and takes 4.84 s to fall 0.218 m. The tension in the yo-yo string is N. The value of the yo-yo’s moment of inertia is kgm2. Find the yo-yo’s rotational velocity when the string has just reached its full length. rads/sec. How much rotational kinetic energy does the yo-yo have? J Once the yo-yo gets to the bottom of the string is does the trick...

A ball of mass M = 2 Kg is released at rest(V0=0) from the top of...

A ball of mass M = 2 Kg is released at rest(V0=0) from the top of a building at a height H=d= 125 m above the ground. There is no air resistance. Take g=10m/s2. The ball's final kinetic energy just before it hits the ground is ___ Joules 25,000 20 2,500 250 A car of mass M=1000 Kg moving initially at Vo= 30 m/s stops (Vf=0)after hitting a cement wall. The car spends a time t=0.015 seconds from the moment it...

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