a 2 100 kg car drives east towards a 55 kg shopping cart that has the velocity of .50 m/s west. The two objects collide, giving the car a final velocity of 6.31m/s east and the shopping cart a velocity of 13.5 m/s east. What was the initial velocity of the car?

Heat from the sun reaches earth to a. radiation b. convection c. conduction

The crank oa rotates in the vertical plane with a constant clockwise angular velocity ω0 of 5.6 rad/s. for the position where oa is horizontal, calculate the force under the light roller b of the 10.6-kg slender bar ab.

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.