- #1

Shah 72

MHB

- 274

- 0

a) Find the child's loss of GPE

I got the ans 800J

there is a constant resistance of 112N throughout

b) find the distance the child has traveled when she comes to rest.

Using work energy principle

Increase in KE =0J

Increase in GPE= -800J

Work done against resistance = -112SJ

So I get S= 7.14m

The slide is inclined at an angle of 30 degree to the horizontal.

C) Find the distance the child travels on the level part of the slide.

I don't understand this part.

Increase in KE= 0J

Increase in GPE= 0- 40×10sin30×2= -400J

Work done by gravity= F×S

I don't understand how to solve further. Pls help