Answer all ten questions in the description clearly. It is essential to include units in your answers, numerical value with the corresponding units.

Question

1.    Calculate the momentum of a 265 kg motorcycle traveling at 25 m/s.

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2.    A rubber ball (1 kg) falls from a height of 10 m and collides elastically with the floor. What is the velocity of the ball as it rebounds from the floor? 

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3.    Two clay balls collide and stick. Ball 1 has a mass of 10 kg and an initial velocity of 10 m/s in the positive x direction. Ball 2 has a mass of 20 kg and an initial velocity of 5 m/s in the negative x direction.  What is the final velocity of the combined mass?

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4.    Two clay balls collide and stick. Ball 1 has a mass of 10 kg and an initial velocity of 5 m/s in the positive x direction. Ball 2 has a mass of 20 kg and an initial velocity of 5 m/s in the negative x direction.  What is the final velocity of the combined mass?

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5.    Two rubber balls undergo an elastic collision. Ball 1 has a mass of 10 kg and an initial velocity of 5 m/s in the positive x direction. Ball 2 has a mass of 10 kg and is stationary.  What is the final velocity of the two balls, v_1f, and v_2f?

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6.    A ceiling fan turns at a rate of 20 RPM what is its speed in radians per second, and the speed of a tip of a 50 cm fan blade in m/s?  

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7.    Calculate the angular momentum of a 265 kg motorcycle traveling at 25 m/s. traveling around a circular curve 500 m in radius

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8.    A ceiling fan turns at a rate of 20 RPM. A 1 gram bug hangs on to the end of a 50 cm fan blade. What is the magnitude of the frictional force between the bug’s feet and the blade?  

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9.    A wrench 30 cm long is attached to a nut and bolt. You exert a 15 N force on the wrench. What is the maximum torque you can exert under these conditions?  

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10.  A uniform beam of length 10 m and mass 100 kg is supported by pylons on either end. A 200 kg box is centered at 5 m from the left end of the beam. What is the downward force on the left most pylon?

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Answer 1

Hi Daniel,

Believe it or not, the purpose of "Ask an Expert" is not to perform your problem sets for you. If you have a specific question on a particular problem, or have trouble applying theory to practice, then you ask. (Check the Wyzant guidelines if you don't believe me.) You shouldn't, and probably won't, get any help on the mountain of problems you posed. If you are completely at sea with the physics course, or are one of those rare individuals who cannot absorb information visually (i.e., by reading your curriculum handouts or textbook), then you need specialized help (get a tutor) or drop the course.