Pat Kinch used a racing cycle to travel 20.0 m/s. Suppose Kinch moved at this speed around a circular track. If the combined mass of Kinch and the
cycle was 92.0 kg and the average centripetal force was 920 N, what was
the radius in meters of the track? (Centripetal Force: Fc = m(v^2)/r ) (Write
the number answer only.)

When the velocity of an object is doubled, by what factor is its momentum changed? by what factor is its kinetic energy changed? a) the momentum is zero. b) the momentum is not zero. c) difficult to say.

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue