Your shopping cart is moving without friction with constantvelocity down and ais
ID: 1724358 • Letter: Y
Question
Your shopping cart is moving without friction with constantvelocity down and aisle in the grocery store. You drop a large canof beef stew straight down into the cart. A)The cart speeds up because its mass has increased B)The cart remains exactly the same velocity, because only itsmass has increased C)The cart slows down because its momentum is distributed overa larger mass D)The cart remains exactly the same velocity, beacuse velocityis conserved E)The cart speeds up because its momentum has increased Hint: No force acts in the horizontal direction, the horizontalcomponent of the momentum is constant. (mass of cart)*v(before) = (mass of cart + can)*v(after) v(after) = v(before)*(mass of cart)/(mass of cart + can) (mass of cart)/(mass of cart + can) < 1. Your shopping cart is moving without friction with constantvelocity down and aisle in the grocery store. You drop a large canof beef stew straight down into the cart. A)The cart speeds up because its mass has increased B)The cart remains exactly the same velocity, because only itsmass has increased C)The cart slows down because its momentum is distributed overa larger mass D)The cart remains exactly the same velocity, beacuse velocityis conserved E)The cart speeds up because its momentum has increased Hint: No force acts in the horizontal direction, the horizontalcomponent of the momentum is constant. (mass of cart)*v(before) = (mass of cart + can)*v(after) v(after) = v(before)*(mass of cart)/(mass of cart + can) (mass of cart)/(mass of cart + can) < 1.Explanation / Answer
C)The cart slows down because its momentum is distributed over alarger mass the concept here is conservation of linear momentum. the can initially had zero momentum and the cart had all of theinitial momentum. when the can was dropped into the cart,momentum from the cart was transferred to the can, such that theyare both moving at the same velocity. since the momentum ofthe cart was decreased, it follows that the velocity had todecrease.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.