D. B and C only
My sister just took the test and im sitting next to her and D is the correct answer
185 newtons because (W=Fd so W/d=F)296/1.6=185
Answer:
11.8 m/s
Explanation:
At the top of the hill, there are two forces on the car: weight force pulling down (towards the center of the circle), and normal force pushing up (away from the center of the circle).
Sum of forces in the centripetal direction:
∑F = ma
mg − N = m v²/r
At the maximum speed, the normal force is 0.
mg = m v²/r
g = v²/r
v = √(gr)
v = √(9.8 m/s² × 14.2 m)
v = 11.8 m/s
If they become closer, it is increased, and if the objects become farther away is decreased.
