Acar increases from 15 km/s to 45 km/s in 5 seconds. calculate the average acceleration of the car during these 5 seconds.
6 km/s2
12 km/s2
30 km/s2
60 km/s2

The answer to your question is 6 km/s

Explanation:

Acceleration is a change in velocity with respect to time, its units are m/s² or km/h².

Data

vo = 15 km/h

vf = 45 km/h

t = 5 s

Formula

Substitution

                    a = (45 - 15) / 5

                    a = 30 / 5

                   a = 6 km/s

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !

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