Question

A skier 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?

Answer 1

Answer:

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:

$E_p = 137200 J$

A height of:

$h = 200 m$

Acceleration of gravity on Earth:

$g = 9.81 m/s^2$

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

$E_p = mgh$

We may rearrange this equation for mass now:

$m = \frac{E_p}{gh}$

Substituting the given variables:

$m = \frac{137200 J}{9.81 m/s^2\cdot 200 m}$

$m = 70 kg$

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.

Answer 2

Answer:

70 kg

Explanation: