Revision test 2 eng mechanics

what is the unit for reaction force?

• unit less

• meter

• Newton meter

• Newton

Free body diagram is included

• force direction, distance and value

• force direction and value

• distance and value

• force direction, distance

what is the formula area for hemicircle?

• $\pi r^2$

• $\frac{\pi r^2}{2}$

• $\frac{bh}{2}$

• $bh$

pinned has two reaction forces. In FBD, the direction for those reaction forces must be

• down and right

• down and left

• up and left

• up and right

Step for calculation should be?

• write formula, fill the value

• write formula, fill the value, answer

• write formula, fill the value, answer with unit

• write formula, fill the value, answer with unit, give the mark

what is the unit for coefficient of static friction?

• meter

• unitless

• newton

• newton meter

how many reaction force for roller support?

• 1

• 2

• 3

• 4

guess who

• me with my phone

• me during stress mood

• me during selfie time

• monkey during selfie time

coordinate x for the object should be

• $2+\frac{12}{3}$

• $2\ +\ \frac{9}{3}$

• $\frac{9}{3}$

• $\frac{12}{3}$

the formula area for the object is

• $2\pi r^{ }$

• $\pi r^2$

• $\frac{\pi r^2}{2}$

• $\frac{\pi r^2}{4}$