Introductory Work Problem

The video tutorial explains how to calculate the work done by a shopper pushing a cart. It covers the problem statement, understanding the angle of force application, and calculating work using the work equation. Common mistakes in work calculation are addressed, and additional calculations for work done by gravity and normal force are discussed. The tutorial concludes with a summary of key points.

What is the force applied by the shopper on the cart?

• 5.0 newtons

• 6.9 newtons

• 8.0 newtons

• 7.5 newtons

At what angle is the force applied relative to the negative y-axis?

• 45 degrees

• 59 degrees

• 30 degrees

• 90 degrees

Why is the displacement considered negative in this problem?

• Because the cart moves downwards

• Because the cart moves upwards

• Because the cart moves to the left

• Because the cart moves to the right

What is the correct angle to use in the work equation for this problem?

• 90 degrees

• 59 degrees

• 0 degrees

• 31 degrees

What is the calculated work done by the force applied by the shopper?

• 41 joules

• 59 joules

• 0 joules

• 25 joules

What is the work done by the force of gravity on the cart?

• 25 joules

• 41 joules

• 59 joules

• 0 joules

Why can't we calculate the work done by the force of friction?

• Because the displacement is zero

• Because the mass of the cart is unknown

• Because the angle is unknown

• Because the force of friction is zero