Sunday
April 20, 2014

Homework Help: Physics ~Conservation of Energy~ part 2

Posted by Isis on Wednesday, January 30, 2013 at 6:12pm.

1.) A 500 kg roller coaster is pulled to the top of a hill 45 m high and arrives at the top with a zero speed.

a) how much work has done by the vhain to pull the car to the top?

b) how much potential energy does it have at the top?

c)What is the total energy of the system?

d) how much kinetic energy does it have at the bottom?

e) what is the speed at the bottom?

2.) A simple pendelum is 1.5 m long and has 3.0 kg bob attached.

a) how much work was done by the chain to pull the car to the top?

b) how much potential energy does it have to the top?

c) what is the total energy of the system?

d) how much kinetic energy does it have at the bottom?

>> FORMULAS <<
KE= 1/2 v^2 (kinetic energy)
PE=mgh (potential energy)
kg.m/s^2.m
W= Fd (work equals force and distance)
Im sorry I don't know which formula to choose. PLease please please help me!

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - Bernoulli's equation is an expression of: the conservation of mass the...
Physics Conservation of Energy - During a rockslide, a 740 kg rock slides from ...
Physics Conservation of Energy - During a rockslide, a 740 kg rock slides from ...
Physics - A bullet with a mass of 55 grams moving with a speed of 100 m/s slams ...
College Physics - A 22.9-kg child is on a swing attached to ropes that are L = 1...
Physics - Alcohol flows smoothly through a horizontal pipe that tapers in cross-...
Physics - Roller Coaster Cart Mass = 200kg String Compressed by 5m Initial ...
Science - The law of conservation of energy states that energy can neither be ...
Physics - URGENT - A small block of mass 5 kg initially rests on a track at the ...
Vague Physics - Does anyone know what the laws of conservation are when dealing ...

Search
Members