An 85 kg object is moving at a constant speed of 15 m/s in a circular path, which has a radius of 20 meters. what centripetal force is exerted on the body? a. 42.50 n b. 63.75 n c. 956.25 n d. 765.00 n

Centripetal force needed to move mass 'm' in a circle with radius 'r' at speed 'v' is

F = m · v² / r

F = (85 kg) ·(15 m/s)² / (20 m)

F = (85kg · 225m²) / (20 m·s²)

F = (85 · 225 / 20)  (kg·m² / m·s²)

F = 956.25  kg·m/s²

F = 956.25 Newtons

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

their crystal patterns have been disrupted by stress