- A 250 g pine derby car rolls down a frictionless ramp from the starting height of 0.75 m. How fast is the car moving as it
exits the ramp?

Answer is in the photo. I can only upload it to a file hosting service. link below!

cutt.ly/nz6VGda

insects!

explanation:

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft