SON T
T₂
T₂
13. Un
For what values of Fan
40N
will the forces shown in
F diagram be in equilibriu
A 60 N and 60°
B. 60 N and 30°
20N C. 20/3 N and 60°
D. 20/3 N and 30°
'14. A metre rule pivoted at its centre has masses m
m, placed at the 20 cm and 65 cm marks respectiv
1

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .