Question

Question 5

You visit the new Chaco Hotel rooftop bar in old town. You're taking pictures of the fabulous views using your new $1,000 phone. Oops! The phone slips out of your hands plummeting to the ground 60 feet below. Ignoring air resistance. how fast is your phone traveling by the time it hits the ground ? [ Hint: 1 meter = 3.28 feet ] ( Circle one answer)

A.) 19mph

B.) 42 mph

C.) 37mph

D.) 602 mph

I am doing test corrections for my physics exam I put C(37mph and that was incorrect. Can you please help with this question very confused about it.

Answer 1

Hi,

Hope you are doing well.

You can simply use kinematic equation for uniformly accelerating bodies.

Here the phone is uniformly accelerating under gravity.

We know that, According to kinematic equations, Final speed of the phone is given by,

Where,

is initial speed of the phone,

is acceleration of the phone,

is distance travelled by the phone/height of drop,

Final speed of the phone is given by,

But we are asked to find final velocity of the phone in miles per hour (mph).

Correct option is option (B).

Hope this helped for your studies. Keep learning. Have a good day.

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