need help on these problems for physics please explain and how work thanks!! A 4

Question

need help on these problems for physics

please explain and how work thanks!!

A 400 kg roller coaster cart travels along the inside of a vertical circular track of radius 10 m. At its highest point it moves at 20 m/s. Friction between the cart and track is negligible. 8. Find the cart's speed one quarter of a loop later (when it's at the same height as the loop's center). a) 24.5 m/s b) 27.5 P/S c) 30.5 m/s d) 33.5 m/s e) 36.5 m/s 9. Find the magnitude of the normal force one quarter of a loop later (when its at the same height as the loop's center). a) 18,000 N b) 21,000 N c) 24,000 N d) 27,000 e) 30,000 N

Explanation / Answer

1)
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