Acar drives straight off the edge of a cliff that is h =42 m high. the police at the scene of the accident note that the point of impact is d =72 m from the base of the cliff. here the initial speed v0 is unknown. ignore air resistance. the magnitude of the gravitational acceleration is 9.8 m/s2. choose the right as positive x-direction. choose upward as postitive y-direction keep 2 decimal places in all answers. how long did it take to hit the ground?

It took 2.93 s

Explanation:

the speed has 2 components in x and in y

v0,y = 0

v0,x = unknown

distance in y = 42 m

distance in x = 72 m

Y:

The car fell 42 m with an initial speed of 0 m/s, gravitational acceleration 9.8 m/s^2

With that information you can calculate the final speed at the moment of impact

I put a minus because it says upward is positive and the speed direction is downward.

would be false hope this out

force tends to be low and long diustance masses are high