Newton's Law of Motion
Not what you're looking for?
Two skaters are in the exact center of a circular frozen pond. Skater 1 pushes skater 2 off with a force of 100 N for 1.69 seconds. If skater 1 has a mass of 34 kg and skater 2 has a mass of 72 kg, what is the relative velocity (v1 - v2) after the push to the nearest hundredth of a m/s?
After reaching the other shore, how fast, to the nearest tenth of a m/s, must skater 1 run around the lake to meet skater 2 at the opposite shore?
Purchase this Solution
Solution Preview
Notations:
F = 100 N = the force of the push
t = 1.69 s = the duration of the push
m_1 = 34 kg = the mass of the first skater
m_2 = 72 kg = the mass of the second skater
Let axis X be in the direction of motion of skater 1 after the push, so that v_1 > 0 and v_2 < 0.
The two skaters get momenta of the same absolute value but opposite in direction:
F*t = m_1*v_1 = -m_2*v_2
So we get:
v_1 = F*t/m_1 ...
Purchase this Solution
Free BrainMass Quizzes
Intro to the Physics Waves
Some short-answer questions involving the basic vocabulary of string, sound, and water waves.
Variables in Science Experiments
How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.
The Moon
Test your knowledge of moon phases and movement.
Basic Physics
This quiz will test your knowledge about basic Physics.
Classical Mechanics
This quiz is designed to test and improve your knowledge on Classical Mechanics.