Recent content by Dorney

The link includes only free response. Do you have the multiple choice questions and answers as well? Thanks!

nm i got it.

[SOLVED] Electric Field and Electric Potential 1. Refer to a sphere of radius R that has a positive charge Q uniformly distributed on its surface. Which of the fllowing represents the magnitude of the electric field E and the potential V as functions of r, the distance from the center of the...

Thank you! That makes so much more sense!

[SOLVED] Perfectly Elastic Collision 1. A particle of mass m and speed V collides at a right angle with a very massive wall in a perfectly elastic collision. What is the magnitude of the change in momentum of the particle? 2. P before colision = P after collision. 3. I think the...

c) F = -60,000 / (1+5t)^2. Thanks, I will look over your explanation and see if I can solve for the function.

[SOLVED] Bullet, block, kinetic energy 1. A small block of mass 2m initially rests on a track at the bottom of a circular, vertical loop-the-loop, which has a radius r. The surface contact between the block and the loop is frictionless. A bullet of mass m strikes the block horizontally from the...

c) F = -12,000 / (1+5t)^2 b) x(t) = ln y. Where y = 1+5t. Can I go any further?

d) impulse = m*(delta v) V at t= 2 is (8/11) m/sec. V at t= 0 is 8 m/sec. Impulse= (1,500)*(8-(8/11)) Impulse= 10,909 kg*m / sec.

b) I should know how to integrate it, but in fact, I do not. Can you help me out with this? c) F=d (mv) / dt ? d) impulse is also equal to m*delta v so, use the equation to find v at 2 sec. (v2-v1)*M

sorry! I realized I posted my question in the wrong spot. It is now in the Intro Physics section.

attempted a) impulse = force*time. The area of the graph under the function = 20 Newtons*sec.

[SOLVED] Momentum problem (Car and object) 1. A crash test car with mass 1,000 kg moving at a constant speed of 12 m/sec collides completely inelastically with an object of mass M at time t=0. The object was initially at rest. The speed V in m/sec of the car-object system after the collision is...

Question I have the same question. Can someone explain how to go about solving this? thanks.