The radius of curvature is smaller at the top than on the sides so that the downward centripetal acceleration at the top will be greater than the acceleration due to gravity, keeping the passengers pressed firmly into their seats. what is the speed of the roller coaster at the top of the loop (in m/s) if the radius of curvature there is 15.0 m and the downward acceleration of the car is 1.50 g?

Explanation:

As we know that the force equation at the top is given as

now we know that

so we have

so we will have

answer; i believe the correct answer is (40,000 j) good luck

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.