Askier with a potential energy of 137,200 j waits on top of a ski jump that is 200 m high. what is the mass of the skier? 20 kg 70 kg 137 kg 686 kg

70 kg

Explanation:

Potential energy can be found by a product of mass, height and the acceleration of gravity. Here we're given a potential energy of:

A height of:

Acceleration of gravity on Earth:

According to the potential energy equation, we can express it as:

We may rearrange this equation for mass now:

Substituting the given variables:

Therefore, the mass of the skier is 70 kg. Make sure to remember the right units: energy is measured in joules, mass is measured in kilograms, acceleration of gravity is measured in meters per second-squared, height is measured in meters.

70 kg

Explanation:

PE = mgh

137200 = mg x 200

686 = mg

686/9.81 = m

m = 69.9286

PE = mgh
137200 = mg x 200
686 = mg
686/9.81 = m
m = 69.9286 (idk how many decimals / sig. figs. you need)

Remember that the equation for gravitational potential energy is PE = mgy, where PE = potential energy, m=mass, g=acceleration of gravity, and y=distance above your reference level.

You know that PE = 137200J, y = 200m, and g = 9.8 . Plug these values into the equation and solve for m:


The mass of the skier is 70kg.

The mass of the skier is 70kg.