Catch the zero work cases

Exercise and reference answers

Items

1. Matches the category

   Yes

   Item

   No displacement

2. Matches the category

   No

   Item

   Skid to a halt

3. Matches the category

   Yes

   Item

   Force is zero

4. Matches the category

   Yes

   Item

   Force at 90 deg

5. Matches the category

   No

   Item

   Lifting a ball

6. Matches the category

   Yes

   Item

   Holding a load

7. Matches the category

   Yes

   Item

   Moon in orbit

8. Matches the category

   No

   Item

   Pushing a trunk

9. Matches the category

   Yes

   Item

   Pushing a wall

10. Matches the category

    Yes

    Item

    Cyclic spring

Category

No work is done

Instructions

Tap the arrows to slide the basket under every case where no work is done.

Explanation