A gymnast spring vertical upward from a trampoline as in figure. The gymnast leaves the trampoline at height of 1.20m and reaches a maximum height of 4.80m before falling back down. all heights are all measured with respect to the ground. Ignoring air resistance, determine the initial speed “vo” with witch the gymnast leaves the trampoline.

The initial velocity of the gymnast is 8.5 m/s.

Explanation:

We can use the kinematic equation

to figure out the initial velocity of the gymnast.

Now, when the gymnast reaches the maximum height,  the distance he has traveled is , and his velocity is zero; therefore .

Thus, we have

true

explanation:

the design of a ski jumping suit involves a trade-off between giving the skiers lift to get higher jumps and ensuring the skier does not face a lot of drag before the jump itself. an expansive suit may to lift the skier higher, but at the same time, it will also increase the air resistance. higher air resistance as the skier goes down the slope limits the speed of the jump. a big suit also increases the risk of losing balance or control, especially if there's a strong gust of wind. while technologically enhanced suits a lot, clothing is not the only factor in a ski jumper’s success. gathering speed while skiing down the slope, ensuring good speed on the ramp, and maintaining good body posture and form in the air all contribute to a ski jumper's success.