Answers created by Peter H.
 Back to user's profile

A 15 kg object moving to the right a 22.5 m/s makes an elastic head on collision with a 30 kg object moving to the left at 18 m/s. After the collision the smaller object 15 kg object moves to the left at 31.5 m/s. What is the velocity of the 30 kg marble?

A student drops a 0.011 kg super ball from a height of 1 m. If the ball returns to a height of .75 m, how much mechanical energy was lost to dissipative forces?

Question #8e836

Vehicle A weighs 3,000 pounds. Under ideal conditions traveling at 55 miles per hour, its braking distance is 200 feet. If it carries 3,000 pounds of extra weight, what is the new braking distance?

What if earth suddenly stop rotation?

Question #c3453

Question #d6cfc

How does angular momentum create a perpendicular force?
How does angular momentum create a perpendicular force?
How does angular momentum create a perpendicular force?

What is rotational dynamics?

What is the relationship between energy and force?

A siren mounted on the top of towers produces a noise of 120 dB at a distance of 2 meters. Treating the siren as a point particle (ignoring reflection and absorption). What is the sound intensity by an observer 12 m away?

Question #f171f

Question #5bc78

Question #4793b

If two people are pulling on the same rope at #"10 N"# of force, what is the tension on the rope?

Question #9f759

Question #53adc

What is the joule apparatus?