Thursday

July 31, 2014

July 31, 2014

Posted by **Isis** on Sunday, February 3, 2013 at 4:30pm.

a) What is the initial kinetic energy of the car?

b) What is the final kinetic energy of the car?

c) what is the net work applied to the car?

d) what force is applied to the car?

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)

~please help me!

- Physics ~please help me! -
**Damon**, Sunday, February 3, 2013 at 4:50pma) (1/2) m v^2 = .5 * 1200 * 4 = 2,400 Joules

b) (1/2) m v^2 = .5 * 1200 *225 = 135,000 Joules

c) 135,000 - 2,400 = 132,600 Joules

d) Force * distance = 132,600

100 F = 132,600

F = 1,326 Newtons

- Physics car is typo? What is "top" ? , what chain? me! -
**Damon**, Sunday, February 3, 2013 at 4:52pmhow far do you lift the bob, up to horizontal? up to top ?

**Related Questions**

Physics - A 1200 kg car is moving on the freeway at 65 mph. (A) find the ...

physics - An experimental flywheel, used to store energy and replace an ...

Physics - A roller-coaster car with a mass of 650 kg starts at rest from a point...

Physics -- check answers please - 1. A boy pushes a car to slow it down while ...

physics - A car has a flywheel ( a diks of R=0.2m and uniformly distributed mass...

physics - A roller-coaster car with a mass of 550 kg starts at rest from a point...

Physics - True or false Consider a simple frictionless roller-coaster. It begins...

Physics - Consider a simple frictionless roller-coaster. It begins at x = 0, at ...

physics - Let a force of 1500 Newtons act through a distance of 200 meters on a ...

Physics - A car is traveling at 14 m/s. How fast would the car need to go to ...