A skier with a mass of m = 60kg slides off a platform of hei...

Question

A skier with a mass of m = 60kg slides off a platform of height h = 20m with a horizontal velocity of 20m/s. Upon landing at point B on the horizontal ground, the skier's horizontal velocity is reduced to 10m/s due to mechanical energy loss during the fall. (Take g = 10 m/s²)

What is the mechanical energy(ΔE) lost during the fall?

To find the mechanical energy lost during the fall, we need to calculate the initial and final mechanical energy of the skier and then determine the difference between the two.

Initial Mechanical Energy

The skier has both potential and kinetic energy at the moment of leaving the platform.

- The skier has potential energy due to the height .

- The skier also has kinetic energy due to the horizontal velocity .

Potential Energy at the Platform

Kinetic Energy at the Platform

The skier's initial horizontal kinetic energy is given by:

So, the total initial mechanical energy is:

Click "Show Answer" to reveal the answer and analysis

Physics

Question

Options

Answer & Analysis

Answer

Analysis

Want More Practice Questions?