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Chapter s | A skater of mass 79.5 kg initially moves in a straight line at...
A skater of mass 76.5 kg initially moves in a straight line at a speed of...
A skater of mass 76.5 kg initially moves in a straight line at a speed of 4.50 m/s. The skater approaches a child of mass 41.0 kg, whom he lifts on his shoulders. Assuming there are no external horizontal forces, what is the skater's final velocity?
A skater of mass 75.5 kg initially moves in a straight line at a speed of...
A skater of mass 75.5 kg initially moves in a straight line at a speed of 5.30 m/s. The skater approaches a child of mass 42.0 kg, whom he lifts on his shoulders. Assuming there are no external horizontal forces, what is the skater's final velocity?
A young ice skater with mass 35.0 kg has fallen and is sliding on the frictionless...
A young ice skater with mass 35.0 kg has fallen and is sliding on the frictionless ice of a skating rink with a speed of 20.0 m/s. a. What is the magnitude of her linear momentum when she has this speed? Express your answer with the appropriate units. b. What is her kinetic energy? Express your answer with the appropriate units. c. What constant net horizontal force must be applied to the skater to bring her to rest in 6.00 s?...
Two railway cars are on a straight railroad track. The first, with mass 8000 kg, moves...
Two railway cars are on a straight railroad track. The first, with mass 8000 kg, moves slowly at a velocity of 0.05 m/s to the right in the direction of the second car of mass 15000 kg, which is stationary. (a) What is the total momentum (relative to the ground) of both cars together? kg m/s They collide and stick to each other. What is the total momentum right after the collision? For the short times involved, you can take...
4. Two children, A and B, each having a mass of 30 kg sit at the edge of the merry-go-round nwhich is rotating at 2 rads Excluding the children, the merry-go-round has a mass of 180 kg and a radiu...
4. Two children, A and B, each having a mass of 30 kg sit at the edge of the merry-go-round nwhich is rotating at 2 rads Excluding the children, the merry-go-round has a mass of 180 kg and a radius of gyration ofk,-06 m 0.75 m 0.75 m 2 rad/s Use 4 significant figures Be carefiul with units and signs. a. Initial total angular momentum pts. b. If child A jumps off hoeizoetally in the-a directice with a speed of...
Calculate the angular momentum, in kg · m2/s, of an ice skater spinning at 6.00 rev/s...
Calculate the angular momentum, in kg · m2/s, of an ice skater
spinning at 6.00 rev/s given his moment of inertia is 0.330 kg ·
m2.
(a) Calculate the angular momentum, in kg . m/s, of an ice skater spinning at 6.00 rev/s given his moment of inertia is 0.330 kg . m2. kg. m/s (b) He reduces his rate of spin (his angular velocity) by extending his arms and increasing his moment of inertia. Find the value of his...
An ice skater is traveling in a straight, horizontal line on the ice with a velocity...
An ice skater is traveling in a straight, horizontal line on the ice with a velocity of v= 7.5 m/s in the positive x-direction. The coefficient of kinetic friction between the skates and the ice is uk= 0.22. a) Write an expression for the normal force, Fn, that the ice pushes against both skates together. Assume the skater's mass is 'm'. b) Using the expression for normal force, write an expression for the skater's acceleration In the x-direction, a. c)...
A stationary skater with a mass of 80.0 kg and a moment of inertia (about her...
A stationary skater with a mass of 80.0 kg and a moment of inertia (about her central vertical axis) of 3.00 kg-m2 catches a baseball with her outstretched arm. The catch is made at a distance of 1.00 m from the central axis. The ball has a mass of 145 g and is traveling at 20.0 m/s before the catch. (a) What linear speed does the system (skater + ball) have after the catch? (b) What is the angular speed...
A 1000 kg car initially moves at a constant speed of 20 m / s on...
A 1000 kg car initially moves at a constant speed of 20 m / s on a straight road. Its linear momentum is: A) 50 kg m / s B) 100 kg m / s C) 20,000 kg m / s D) 20 kg m / s
1. A 30.00 kg mass moving with the velocity of 10 m/s. The momentum of the...
1. A 30.00 kg mass moving with the velocity of 10 m/s. The momentum of the body will be A. 144.2 kg m/s. B. 187.8 kg m/s. C. 320.0 kg m/s. D. 442.4 kg m/s. E. None of the above 2. Out of the following which one is not a vector quantity? A. Force B. Impulse C. Mass D. velocity 3. Impulse is the product of which two quantities? A. Mass and Time B. Mass and Momentum C. Force and...
4. Two children, A and B, each having a mass of 30 kg sit at the edge of the merry-go-round nwhich is rotating at 2 rads Excluding the children, the merry-go-round has a mass of 180 kg and a radius of gyration ofk,-06 m 0.75 m 0.75 m 2 rad/s Use 4 significant figures Be carefiul with units and signs. a. Initial total angular momentum pts. b. If child A jumps off hoeizoetally in the-a directice with a speed of...
Calculate the angular momentum, in kg · m2/s, of an ice skater
spinning at 6.00 rev/s given his moment of inertia is 0.330 kg ·
m2.
(a) Calculate the angular momentum, in kg . m/s, of an ice skater spinning at 6.00 rev/s given his moment of inertia is 0.330 kg . m2. kg. m/s (b) He reduces his rate of spin (his angular velocity) by extending his arms and increasing his moment of inertia. Find the value of his...
1. A 30.00 kg mass moving with the velocity of 10 m/s. The momentum of the body will be A. 144.2 kg m/s. B. 187.8 kg m/s. C. 320.0 kg m/s. D. 442.4 kg m/s. E. None of the above 2. Out of the following which one is not a vector quantity? A. Force B. Impulse C. Mass D. velocity 3. Impulse is the product of which two quantities? A. Mass and Time B. Mass and Momentum C. Force and...
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