3/ A uniform metre ruler, acted upon by three forces is balanced on a pivota shown in Figure 1.23.
20 N
F
30 cm
70 cm
G
fo
6N
14 N
Figure 1.23
р
P
a) Which one of the forces has no moment about the pivot? Explain your
a
answer.
b) Calculate the moments of the other two forces about the pivot.
c) Will the ruler turn? Explain.
4. The velocity of free-falling ball at different time intervals on unknown​

(75°f − 32) × 5/9 = 23.889°c

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it

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.