- #1

rum2563

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## Homework Statement

A grocery cart is being pushed with a force of 450 N at an angle of 30 degrees to the horizontal. If the mass of the cart and the groceries is 42 kg:

a) Find force of friction if coefficient of friction is 0.6

b) Find acceleration of cart.

## Homework Equations

Ff=uFnormal

F=ma

Fn=mg

## The Attempt at a Solution

I figured out part A and I got 3.8 X 10^2 N as force of friction.

For part B, I tried to find force applied.

Fa = 450 N X cos30 degrees

= 389.7 N

and then find net force:

Fnet = 389.7 - (3.8 X 10^2)

= 9.7

and then find acceleration:

a = 9.7 / 42

= 0.23

But the answer is wrong and I checked from my book. Can someone tell me if I am right on part B of this question. Thanks.