A stone whirled on a string experiences a centripetal acceleration of 10 m/s². If the string were shortened to half its length (one-half the radius) and the speed were doubled, calculate the centripetal acceleration. m/s2

How much force must a locomotive exert on a 12840-kg boxcar to make it accelerate forward at 0.490 m/s2?

What is the length x of the side of the triangle below? (hint: use the cosine function)

Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter