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A spanner with a long handle

Explanation: The use of a spanner for opening the nut of a simple machine will employ the principle of moment.

The force apply to the nut is considered as load while the force applied to the spanner is considered to be effort.

Before the nut can be opened, the effort must overcome the load.

Since moment is the product of a force and the perpendicular distance, the spanner with a long handle will produce a higher moment.

Therefore, a spanner with a long handle will be preferred.

trig 15.3 cos

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.