At the local grocery store, you push a 15.0-kgshopping cart. You stop for a mome

Question

At the local grocery store, you push a 15.0-kgshopping cart. You stop for a moment to add a bag of dog food to your cart. With a force of 13.0N , you now accelerate the cart from rest through a distance of 2.20m in 2.65s .

Part A

What was the mass of the dog food?

Express your answer using two significant figures.

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At the local grocery store, you push a 15.0-kgshopping cart. You stop for a moment to add a bag of dog food to your cart. With a force of 13.0N , you now accelerate the cart from rest through a distance of 2.20m in 2.65s .

Part A

What was the mass of the dog food?

Express your answer using two significant figures.

SubmitMy AnswersGive Up

Explanation / Answer

s = (1/2)(v + u)t

2s/t = v + u

2(2.20)/2.65 = v + 0

v = 1.66 m/s

v^2 = u^2 + 2as

(1.60)^2 = 0 + 2(a)(2.20)

a = 0.626557 m/s^2


F= ma
m = F/a = 13/ 0.626557 = 20.7483 kg

dog food = 20.7483 - 15 = 5.7483 kg

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