The roller coaster car has a mass of 700 kg, including its passenger. if it is released from rest at the top of the hill a, determine the minimum height h of the hill crest so that the car travels around both inside the loops without leaving the track. neglect friction, the mass of the wheels, and the size of the car. what is the normal reaction on the car when the car is at b and when it is at c? take = 7.5 m and = 5 m.

Now when it will reach at point B then its normal force is just equal to ZERO

Explanation:

Since we need to cross both the loops so least speed at the bottom must be

also by energy conservation this is gained by initial potential energy

so we will have

now we have

here we have

R = 7.5 m

so we have

Now when it will reach at point B then its normal force is just equal to ZERO

now when it reach point C then the speed will be

now normal force at point C is given as

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this