# Posts by Hardy

Total # Posts: 6

**physic**

.24

**Physics**

The system shown in the ﬁgure is in equilibrium. A 15 kg mass is on the table. A string attached to the knot and the ceiling makes an angle of 54◦ with the horizontal. The coeﬃcient of the static friction between the 15 kg mass and the surface on which it ...

**Math**

If f(x) = │(x² – 50)│, what is the value of f(-5) ?

**SAT Math**

A cubical block of metal weighs 6 pounds. How much will another cube of the same metal weigh if its sides are twice as long?

**Math**

would someone please solve this

**Math**

how would i make r the subject of the formulae: w=ar/R-r