Arobot probe drops a camera off the rim of a 239 m high cliff on mars, where the free-fall acceleration is −3.7 m/s2 .
a. find the velocity with which the camera hits the ground.
b. find the time required for it to hit the ground.

For the camera that is dropped by a robot on a high cliff on mars, we have:

a. The velocity with which the camera hits the ground is 42.05 m/s.

b. The time required for it to hit the ground is 11.4 s.

a. The velocity when the camera hits the ground can be calculated with the following equation:

Where:

: is the final speed =?

: is the initial speed = 0 (the camera is dropped)

g: is the acceleration due to gravity in mars = -3.7 m/s²

h: is the height = 239 m

Hence, the final speed is:

b. The time required for it to hit the ground is the following:

Therefore, the camera hit the ground after 11.4 seconds.

You can see another example of free fall here: link              

I hope it helps you!

i think its d if wrong im sorry