The position vector of a particle changes with time according to the relation

PHYSICS · Single correct · AP · Physics C: Mechanics · Kinematics · Kinematics

Problem

The position vector of a particle changes with time according to the relation r⃗(t)=15t2i^+(4−20t2)j^\vec{r}(t) = 15t^2\hat{i} + (4 - 20t^2)\hat{j} . What is the magnitude of the acceleration at t=1t = 1 ? (1) 40 (2) 25 (3) 100 (4) 50

Related theory

Browse the problem library