Physics 121 Exam 5 Question and
answer rated A+ 2025
Rotation & Linear Motion - correct answer ✔v = wr
x = rθ
a = rα
Moment of Inertia - correct answer ✔I= ∑mr² = ∫r²dm
Parallel Axis Theorem - correct answer ✔I = Icm + MD²
Kinetic Energy - correct answer ✔K=½Iw²
Rolling Objects - correct answer ✔K= ½mv² + ½Iw², v=wR
Cross Product - correct answer ✔A × B = (Ax, Ay, Az) × (Bx, By, Bx)
= (AyBz - ByAz, AzBx - BzAx, AxBy- BxAy)
Torque - correct answer ✔T = r × F = rFsinθ = r⊥F
Angular Momentum - correct answer ✔L = r × mv or L = Iw
Newton's 2nd Law for Rotation - correct answer ✔T = dL/dt or T = Iα
Work-Energy Theorem - correct answer ✔W = ∫tdθ, Kf-Ki = Wtotal
Ef-Ei =Wfriction
answer rated A+ 2025
Rotation & Linear Motion - correct answer ✔v = wr
x = rθ
a = rα
Moment of Inertia - correct answer ✔I= ∑mr² = ∫r²dm
Parallel Axis Theorem - correct answer ✔I = Icm + MD²
Kinetic Energy - correct answer ✔K=½Iw²
Rolling Objects - correct answer ✔K= ½mv² + ½Iw², v=wR
Cross Product - correct answer ✔A × B = (Ax, Ay, Az) × (Bx, By, Bx)
= (AyBz - ByAz, AzBx - BzAx, AxBy- BxAy)
Torque - correct answer ✔T = r × F = rFsinθ = r⊥F
Angular Momentum - correct answer ✔L = r × mv or L = Iw
Newton's 2nd Law for Rotation - correct answer ✔T = dL/dt or T = Iα
Work-Energy Theorem - correct answer ✔W = ∫tdθ, Kf-Ki = Wtotal
Ef-Ei =Wfriction
