6. A child is sitting on a sled and together they have a mass of 25.0...
6. A child is sitting on a sled and together they have a mass of 25.0 kg. The sled is on the top of a uniform 25.0° hill that is 65.0 meters long. If the coefficient of friction between the sled and the snow is 0.32, how long does it take the child to get to the bottom?
7. There is a ride at the fair where swings are attached by a 2.60m long chain to a large rotating disk (radius 4.00m). If a 20.00 kg child sitting in swing is rotated at 3.23 m/s, what is the Tension in the chain?
8. On the above carnival ride, the swings sway out making the ride more exciting. At 3.23 m/s, how much does the chair swing out (measured as an angle from horizontal)
9. When a 0.432 kg soccer ball is kicked from rest. If the foot is in contact with the ball for 8.00 ms, and the final velocity of the ball is 25.0 m/s, find the average force exerted on the ball.
Homework Answers
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6. A child is sitting on a sled and together they have a mass of
25.0...
QUESTION 1: A 36.0-kg child swings in a swing supported by two chains, each 2.90 m...
QUESTION 1: A 36.0-kg child swings in a swing supported by two chains, each 2.90 m long. The tension in each chain at the lowest point is 424 N. (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 36.0-kg child swings in a swing supported by two chains, each 2.90 m long. The tension in each...
You are sitting in a sled, at rest on a pond covered with nice, thick, frictionless...
You are sitting in a sled, at rest on a pond covered with nice, thick, frictionless ice. Your own mass of is 84 kg, and the mass of the sled when empty is 11.5 kg. (a) From shore, someone throws a baseball of mass 0.11 kg to you, and you catch it; the horizontal component of the ball’s velocity is 32.6 m/s. What will be the sled’s (and your) speed with respect to the surface of the pond after you...
PLEASE ANSWER ALL PARTS, THANK YOU !!!!! You are sitting in a sled, at rest on a pond covered with nice, thick, frictionless ice. Your own mass of is 84.0 kg, and the mass of the sled when empty is 11...
PLEASE ANSWER ALL PARTS, THANK YOU !!!!! You are sitting in a sled, at rest on a pond covered with nice, thick, frictionless ice. Your own mass of is 84.0 kg, and the mass of the sled when empty is 11.0 kg. (a) From shore, someone throws a baseball of mass 0.11 kg to you, and you catch it; the horizontal component of the ball’s velocity is 25.2 m/s. What will be the sled’s (and your) speed with respect to...
A 37.0-kg child swings in a swing supported by two chains, each 3.06 m long. The...
A 37.0-kg child swings in a swing supported by two chains, each 3.06 m long. The tension in each chain at the lowest point is 354 N. (a) Find the child's speed at the lowest point. 5.8 Incorrect: Your answer is incorrect. Can you find the net force on the child at the lowest point of the swing? Do you expect this to be zero if the child is moving in a circle? m/s (b) Find the force exerted by...
Please answer all parts a)A child of mass 35 kg is sitting on the seat of...
Please answer all parts
a)A child of mass 35 kg is sitting on the seat of a swing, suspended from a rigid bar on ropes that are 2.0 m long. Calculate the moment of inertia of the child with respect to the bar about which the swing rotates. b) Two very thin concentric circular hoops of mass 0.20 kg and 0.30 kg have radi of 1.5 m and 0.90 m respectively. They are connected by rigid links of negligible mass...
A 39.0-kg child swings in a swing subported by two chains, each 3.08 m long. The...
A 39.0-kg child swings in a swing subported by two chains, each 3.08 m long. The tension in each chain at the lowest point is 428 N. (a) Find the child's speed at the lowest point. (b) nnd the tree exerted by the seat on the child at the lowest point. (Ignore the mass of the seat.) N (upmard) A certain light truck can go around a filat curve having a radius of 150 m with a maximum speed of...
A child stands on a cart initially at rest. The cart and child together have mass...
A
child stands on a cart initially at rest. The cart and child
together have mass of 60kg. Also on the cart are three large
blocks. Blocks A has a mass of 10kg, block B has a mass of 20kg,
and block C has a mass of 30kg. The child throws each block
horizontally away from the cart with a speed of 12 m/s relative to
cart always.
4. A child stands on a cart initially at rest. The cart...
A child of mass 26 kg swings (摇摆) at the end of an elastic cord (弹性绳)....
A child of mass 26 kg swings (摇摆) at the end of an elastic cord (弹性绳). At the bottom of the swing, the child’s velocity is horizontal, and the speed is 8 m/s. At this instant the cord is 3.10 m long. [You can neglect air resistance.] (a)At this instant, what is the parallel component of the rate of change of the child’s momentum? (b)At this instant, what is the perpendicular component of the rate of change of the child’s...
Please answer all parts
a)A child of mass 35 kg is sitting on the seat of a swing, suspended from a rigid bar on ropes that are 2.0 m long. Calculate the moment of inertia of the child with respect to the bar about which the swing rotates. b) Two very thin concentric circular hoops of mass 0.20 kg and 0.30 kg have radi of 1.5 m and 0.90 m respectively. They are connected by rigid links of negligible mass...
A 39.0-kg child swings in a swing subported by two chains, each 3.08 m long. The tension in each chain at the lowest point is 428 N. (a) Find the child's speed at the lowest point. (b) nnd the tree exerted by the seat on the child at the lowest point. (Ignore the mass of the seat.) N (upmard) A certain light truck can go around a filat curve having a radius of 150 m with a maximum speed of...
A
child stands on a cart initially at rest. The cart and child
together have mass of 60kg. Also on the cart are three large
blocks. Blocks A has a mass of 10kg, block B has a mass of 20kg,
and block C has a mass of 30kg. The child throws each block
horizontally away from the cart with a speed of 12 m/s relative to
cart always.
4. A child stands on a cart initially at rest. The cart...
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