How do I answer this:

A point on a rotating turntable 20.0 cm from the center accelerates from rest to a final speed of 0.700 m/s in 1.75 s. At t = 1.25 s, find the magnitude and direction of (a) the radial acceleration, (b) the tangential acceleration,
and (c) the total acceleration of the point.

Question

How do I answer this:

A point on a rotating turntable 20.0 cm from the center accelerates from rest to a final speed of 0.700 m/s in 1.75 s. At t = 1.25 s, find the magnitude and direction of (a) the radial acceleration, (b) the tangential acceleration,
and (c) the total acceleration of the point.

anonymous · Answer

angular velocity=0.7
T=1.75
radius=20cm
apply formulas for individual questions

australopithecus · Answer

can you provide me with the formulas?

anonymous · Answer

$$a= \sqrt{at ^{2}+acp ^{2}}$$

australopithecus · Answer

is acp radial acceleration?

anonymous · Answer

here tangential velocity will be zero ok meanns linear accn equals to acp radial accn

anonymous · Answer

solve this qnn as u knw a means linear accn

australopithecus · Answer

I got a = 0.4m/s^2
use the formula a = at + ar to find at
so I have 0.4 =at  + ar
-6.25^2/0.2 = -31.25

0.4 + 31.25 = at

this is probably incorrect

anonymous · Answer

as far i knw when we square v it becomes +Ve