# Physics.

posted by .

A roller-coaster car speeds down a hill past point A where R1 = 8.6 m and then rolls up a hill past point B where R2 = 16.0 m.

(a) The car has a speed of 18.4 m/s at point A. if the track exerts a normal force on the car of 2.21 104 N at this point, what is the mass of the car?

(b) What is the maximum speed the car can have at point B for the gravitational force to hold it on the track?

## Similar Questions

1. ### physics

A roller-coaster car speeds down a hill past point A where R1 = 8.0 m and then rolls up a hill past point B where R2 = 14.0 m. The car has a speed of 21.0 m/s at point A. if the track exerts a normal force on the car of 2.19 multiplied …
2. ### Physics

A roller-coaster car speeds down a hill past point A and then rolls up a hill past point B. The car has a speed of 16.1 m/s at point A. The acceleration of gravity is 9.81 m/s^2. Radius of Circle A is 9.98 m. Radius of Circle B is …
3. ### Physics

A roller-coaster car speeds down a hill past point A where R1 = 9.8 m and then rolls up a hill past point B where R2 = 15.8 m (R1 and R2 represent the radiuses/ radii) The car has a speed of 18.6 m/s at point A. if the track exerts …
4. ### physics

A roller coaster car speeds down a hill past point A and then rolls up a hill past hill B.The car has a speed of 16.9 m/s at point A. THe acceleration of gravity is 9.81 m/s^2.If at point A the track exerts a force on the car that …
5. ### Physics

a frictionless roller coaster car of mass m = 719 kg tops the first hill with speed v0 = 15.2 m/s at height h = 48.9 m. How much work does the gravitational force do on the car from that point to (a) point A, (b) point B, and (c) point …
6. ### Physics

A roller-coaster car speeds down a hill past point A where R1 = 10.4 m and then rolls up a hill past point B where R2 = 15.6 m, as shown below. R1 and 2 are radii (a) The car has a speed of 21.0 m/s at point A. if the track exerts …
7. ### Physics

At the beginning of a roller coaster ride, the car is lifted to the top of a large hill and released. The speed of the car at the top of the hill is small, so we will assume it to be zero. The car rolls freely down this hill and reaches …
8. ### Physics

At the beginning of a roller coaster ride, the car is lifted to the top of a large hill and released. The speed of the car at the top of the hill is small, so we will assume it to be zero. The car rolls freely down this hill and reaches …
9. ### Physics

At the beginning of a roller coaster ride, the car is lifted to the top of a large hill and released. The speed of the car at the top of the hill is small, so we will assume it to be zero. The car rolls freely down this hill and reaches …
10. ### Physics

A roller-coaster car speeds down a hill past point A where R1 = 8.2 m and then rolls up a hill past point B where R2 = 15.4 m, as shown below. (a) The car has a speed of 21.0 m/s at point A. if the track exerts a normal force on the …

More Similar Questions