What is the gravitational force on a 10 kg sled traveling at 3.5 m/s down a track?

a. 9.8 N
b. 3.5 N
c. 35 N
d. 98 N

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Elements that have one valence electron and are very reactive are called

First to answer will be the brainliest i need the answer asap