Weight, mass and the normal force

Answer Key - Grade 11 Science Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   A box has a mass of 3 kg. With g = 9.8 m/s², what is its weight, Ari?

   29.4 N
2. 2.

   A box has a mass of 0.6 kg. With g = 9.8 m/s², what is its weight, Esme?

   5.88 N

3. Read this first

   Use this

   The elevator is not moving.

5. 3.

   In the free-body diagram, what does the scale read, Jun?

   • 49 N
   • 5 N, the box's mass
   • 0 N
6. 4.

   In the free-body diagram, which force does the scale actually measure, Kira?

   Use the picture in question 3.

   • The normal force it pushes up with
   • The box's mass in kilograms
   • The elevator's speed
7. 5.

   The elevator now rises at a steady 2 m/s with the same box. What does the scale read, Luz?

   • 49 N, the same as at rest
   • More than 49 N, since it is moving up
   • Less than 49 N
8. 6.

   A 5 kg box is taken to the Moon, where g is 1.62 m/s² (NASA). What is its mass there, Milo?

   • 1.62 kg
   • Still 5 kg
   • Less than 5 kg
9. 7.

   Which unit should Noah use for a box's weight?

   • Kilograms
   • Meters
   • Newtons
10. 8.

    A 1 kg box sits on top of a 2 kg box on a table. What normal force does the table push up with, Ren?

    • 9.8 N
    • 19.6 N, the bottom box's weight
    • 29.4 N
11. 9.

    A 1 kg mass hangs still from a spring scale. What does the scale read, Tala?

    • 0 N
    • 1 N
    • 9.8 N
12. 10.

    A drone lifts a box straight up at a steady speed. How does the cable's pull compare with the box's weight, Zee?

    • They are equal
    • The pull is zero
    • The pull is bigger, since the box is moving up