The equation for the acceleration of a body moving in a circle is , where a is acceleration, v is velocity and r is the radius of the circle. acceleration has units of m/.

a. what is the acceleration of a body moving with a velocity of 30 m/s in a circle of radius 10 m?

b. solve the equation for velocity

c. what is the velocity of a body that has an acceleration of 20 m/ and is moving in a circle of radius 2 m?

a. Since the acceleration equation is given to us, we can just plug in:

m/s²

b. Use algebra:

c. Use the equation derived in b and plug in:

m/s

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.