1) What is the linear momentum of an object with mass 50 kg and speed 15 m/s?2) A 0.25 kg ball of clay is thrown at a stationary 5 kg block of wood. The clay sticks to thewood and their velocity after is 3 m/s. What was the original velocity of the clay?3) A 50 kg boy on skates moves with a speed of 5 m/s. He runs into a stationary girl with skatesof mass 40 kg. Assuming they stick together, what is their speed after the collision?4) A running back with a mass of 80 kg and speed 8 m/s collides with, and is held by, a 120 kgdefensive tackle going in the opposite direction. How fast must the tackle be going before thecollision for their speed afterward to be zero?5) An object is pushed along a horizontal surface with a force of 10 N. If the object is moved 15m, how much work does the pushing force do? How much work does gravity do?6) As it orbits the Earth, the 11,000 kg Hubble Space Telescope travels at a speed of 7,900 m/sand is 560,000 m above the Earth's surface. What is its kinetic and potential energy?7) A child on a swing has a speed of 7.7 m/s at the low point of the arc. What will be themaximum height of the child?8) If an object is thrown straight up and reaches a height of 20 m, what was the initial speed ofthe object?9) An object of 2 kg is moving in a circle of radius 4 m and speed 0.5 m/s. What is the angularmomentum of the object? 1) A bullet of mass 0.01 kg is fired horizontally into a block of wood of mass 2 kg. The wood ishanging on a string initially at rest. When the bullet hits the wood it gets embedded into thewood then they swing upward to a height of 0.1 m. What was the initial speed of the bullet?

Solution of 1, 2 & 3 as follows

1) What is the linear momentum of an object with mass 50 kg and speed 15 m/s? 2) A 0.25 kg ball of clay is thrown at a stationary 5 kg block of wood. The clay sticks to the wood and their velocity after is 3 m/s. What was the original velocity of the clay? 3) A 50 kg boy on skates moves with a speed of 5 m/s. He runs into a stationary girl with skates of mass 40 kg. Assuming they stick together, what is their speed after the collision?

1) What is the linear momentum of an object with mass 50 kg and speed 15 m/s? 2) A 0.25 kg ball of clay is thrown at a stationary 5 kg block of wood. The clay sticks to the wood and their velocity after is 3 m/s. What was the original velocity of the clay? 3) A 50 kg boy on skates moves with a speed of 5 m/s. He runs into a stationary girl with skates of mass 40 kg. Assuming they stick together, what is their speed after the collision?

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter9: Linear Momentum And Collisions

Section: Chapter Questions

Problem 9.91AP: A 2.00-g particle moving at 8.00 m/s makes a perfectly elastic head-on collision with a resting...

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