9. A 70kg man weighs 686 Newtons on Earth. That man traveled to Planet X which has 5 times more gravity than Earth. What are his mass and weight on Planet X?
a. Mass = 350 kg and weight = 3,430 N
b. Mass = 70 kg and weight = 3,430 N
c. Mass = 350 kg and weight = 686 N
d. Mass = 70 kg and weight = 686 N

Apiano tuner uses a tuner to create a tone of 5.00 x 10² hz. when a key on the piano is struck he hears 5 beats per second. what is a possible frequency of vibration for the piano string? 2500 hz 1300 hz 605 hz 495 hz

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

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