Physics, 14.02.2020 20:58 kynlie1760
A 58-kg ice skater moves across the ice at a constant speed of 2.0 m/s. She is caught by her 69-kg partner, and then the pair continues to glide together. He is at rest when he catches her, and immediately afterward they both coast. Even though the "magnitude of the change in momentum" is requested, you should provide a negative sign if the final momentum is less than (or more negative) than the initial momentum.
a. What is their velocity just after the catch? Assume she moves in the positive x-direction before her partner catches her.
b. A skater follows the girl at a constant speed of 1.0 m/s. What is the magnitude of the girl's change in momentum in the reference frame of the skater?
Answers: 1
Physics, 22.06.2019 19:10
3. a worker pushes a 30.5 kg polished stone along a polished table with a force on bonin a straight line for 5.20 s after starting from rest. there is no friction between thestone and the table. at the end of the table. the stone is hooked to a cable with a lengthof 62.0 cm to rotate it to a rough table to store until they can be picked up. the roughtable has a coefficient of static friction 0.702 with the polished stone. remember that 8= 9.80 m/s2a) what is the speed of the stone when it is hooked to the cable? b) what is the tension in the cable while the stone is rotating? (there is still nofriction)c) how much force is needed to make the stone begin sliding from rest on therough table? ius = 0.70262.0 cm30.5 kg20.5 kg6= 0
Answers: 2
Physics, 23.06.2019 00:30
Arope has one end tied to a vertical support. you hold the other end so that the rope is horizontal. if you move the end of the rope back and forth with a frequency of 4 hz, the transverse wave you produce has a wavelength of 0.5 m. what is the speed of the wave in the rope?
Answers: 1
Physics, 23.06.2019 11:00
Which temperature scale measures water boiling at 100 degrees? which temperature scale measures water boiling at 100 degrees?
Answers: 1
A 58-kg ice skater moves across the ice at a constant speed of 2.0 m/s. She is caught by her 69-kg p...
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