Question

I have the answers but I want to know the precedure please!

A) An athlete in good physical condition can land on the ground at a speed of up to 12 m/s without injury. Calculate the maximum height from which the athlete can jump without injury. Assume that the takeoff speed is zero. Answer；7.3m

B)One of the world’s fastest roller coaters has a velocity of 8.0km/h forward as it starts its descent on the first hill. Determine the coaster’s maximum velocity at the base of the hill, assuming the average acceleration of 35.3(km/h)/s forward lasts for 4.3s. Answer：43.9m/s forward

C) With what initial velocity must a badminton birdie be traveling if in the next 0.80s its velocity is reduced to 37m/s forward, assuming that air resistance causes an average acceleration of -46m/s2forward. Answer：73.8

D)14.A car traveling along a highway must uniformly reduce its velocity to 12m/s [N] in 3.0s. If the displacement traveled during that time interval is 58m [N], what is the car’s average acceleration? What is the initial velocity?

-4.9m/s^2 ; 27m/s

Answer 1

A

Step-by-step explanation:

because answer 46 is n so 3 for 2