Purchase Solution

Classical Mechanics Homework Problems

Not what you're looking for?

Ask Custom Question

See attached file for full problem description.

1. Two masses are released at the same height, and fall a very long distance under gravity, till they hit the ground. The masses are subject to air friction, which you should assume has the form —b17 for both masses, even if this mathematical form is not very accurate. Mass A is made of lead. Mass B is made of a much less dense plastic. Both masses have the same size and shape, and therefore have the same friction coefficient b. Which one reaches the ground l first?
(A) They both reach the ground at the same time.
(B) Mass B reaches the ground first.
(C) Mass A reaches the ground first.

2. A mass is thrown upwards on the earth, with an initial velocity vo. It reaches some maximum height he. (Ignore air friction.) The experiment is repeated on the Moon with the same mass and the same 110, and the mass reaches a different height hm, because the acceleration of gravity on the Moon is ~ 1/6 that on the earth. In these two experiments, the potential energy at the maximum height is, respectively, U8 and Um. What is the relationship between U6 and Um?
(A) Ue : Um
(B) U6 = /§Um
(C) Ue = 6Um
(D) Ue = %Um
(E) U6 = §Um
(F) Ue = 36Um

3. A 1 kg projectile is fired (on Earth) with a speed of 10 rn/ s, at an angle 60° above the horizontal. It is subject to gravity, but not friction. Which of the following is the best estimate of its speed when it reaches a point 3 meters higher than the initial position?
A) 8.5 m/s
B) 6.3 m/s
C) 2.0 m/s
D) 1.1 m/s

Purchase this Solution

Solution Summary

The solution answers three questions concerning gravitational concepts.

Purchase this Solution

Free BrainMass Quizzes
Basic Physics

This quiz will test your knowledge about basic Physics.

Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

The Moon

Test your knowledge of moon phases and movement.

Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.