# Help with a torque question

#### a_narain

1. Homework Statement
A garden cart loaded with firewood is being pushed horizontally when it encounters a step 8.0 cm high, as shown in the figure. The mass of the cart and its load is 64 kg, and the cart is balanced so that its center of mass is directly over the axle. The wheel diameter is 60 cm. You are pushing the cart horizontally by a handle.

2. Homework Equations
torque = rFsin(angle)
Newton's laws

3. The Attempt at a Solution
I tried to find the torque that occurs as a result of the step applying a force on wheel. I originally thought that the force the person was applying was equal to the force that the wheel applied to the step. Thus, since the step is 8 cm high, I thought that the torque due to the step was .30(F)sin(74.5). But I am having trouble figuring out if this is equal to zero or something else?

Related Introductory Physics Homework Help News on Phys.org

#### LowlyPion

Homework Helper
Welcome to PF.

What is the question?

### Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving