Question

Ctrl Alt Fn PHYS 1101 Totals S: ov. ?, 201? Page 4: Page 5: page 3 of 5 Sample Second Midt down,c er is riding a skateboard going to the right. One wheel is stuck so that it is rubbing on the ground and slowing 15 marks) y diagrams for Ravinder and for the skateboard. Don't forget to include the net force near each diagram Ravinder Skatcboard b) On the free body diagrams connect all interaction pairs with dotted lines. [2 marks) S5. You are designing a roller coaster. The track has a hill followed by a "dip" as shown. This is to be a non-looping roller coaster so the riders will not be strapped into their seats. a) Where is there a concern that riders might fall out of the roller coaster? Explain why. One or more free body diagrams might help with your explanation. [3 marks] ple experience high accelerations it can cause them to lose consciousness. Where is there a risk that riders b) If peo experience high accelerations in this ride? Explain. [2 marks]

Answer 1

N - Normal force by skate brand on Ravinder f_1 = friction force skate bound on Ravinder mg - wt of Ravinder No - Normal force by ground N - Normal force of Ravinder mg - wt of sketch brand f_2 = friction force by ground f_1 = friction force by Ravinder cos theta mg - N = mv/R so for passengers with n fall cos theta mg = N > 0 They might force when N = 0 = > cos theta mg = mv^2/R cos theta = v^2/kg \r\n so it depends upon V and R since gravity will increase the down slope & the cos theta decrease down slope so the interval indicated in the diagram below will contribute to the area prove to passenger where they can left the cart (b) total acceleration = squareroot ac^2 at^2 ac - centripetal at - tangential v = u + gt