Question

Only part C, Please show your work im not sure what number i mixed up but i keep getting 7973.57N or 23544N which are incorrect.

Express your answer to three significant figures and include the appropriate units. The roller coaster car has a mass of 800 kg, including its passenger. It is released from rest at the top of the hill A. Neglect friction, the mass of the wheels, and the size of the car. Take hB = 17 m, PB = 8.5 m, hc = 14 m , and pc = 7 m. (Figure 1) NB= ON Submi Previous Answers ✓ Correct Figure (< 1 of 1 Part C What is the normal reaction on the car when the it is at C? Express your answer to three significant figures and include the appropria Nc = 7.97 Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining

Answer 1

For minimum height of hill at A, the normal force at B should be zero. Hence,

ΣF, = man

mg+ NB = m- Pв

= mg + 0 = т рв

v=PB9

By conservation of energy between A and B;

= 2g(ha - hB)

→ PB9 = 2g|ha - hB)

ha=hB+

8.5 ha=17+

ha= 21.25 m

By conservation of energy between A and C;

va = 2g(ha - hc)

合 = 219.81)(21.25-14)

= v = 142.245

By force equilibrium;

ΣF, = man

= mg+Nc = m င်

(142.245) = 800(9.81)+ Nc = (800)

c = 8409 8

→ No = 8.41 kN

...(Answer)