Force, mass and acceleration
Grade 8 Science Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
“Force arrow diagram, one dimension, arrows drawn to scale by size. Beside it:” Ari pushes a wagon with a mass of 10 kg, and it speeds up at 2 m/s². Force = mass × acceleration. What is the net force?
Bo pushes a box of books on a cart with a mass of 12 kg, and it speeds up at 3 m/s². Force = mass × acceleration. What is the net force?
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Force arrow diagram, one dimension, arrows drawn to scale by size. Box A labeled 20 kg: net force ? pointing right. Beside it:
Esme pushes a shopping cart with a mass of 20 kg, and it speeds up at 4 m/s². Force = mass × acceleration. What is the net force?
In gym, Kira pushes a soccer ball and a heavy medicine ball with the same 10 N. Which speeds up more?
- Both the same
- The medicine ball, since it has more mass
- The soccer ball
arrows drawn to scale by size. Luz pulls an empty sled, then the same sled with a backpack, each with 4 N. Which speeds up more?
- The loaded sled, since mass helps
- Neither, since 4 N is small
- The empty sled
Milo labels a science table. Which unit goes with acceleration?
- kg
- m/s²
- m/s
- N
Noah writes F = m × a on a card. Which unit goes with F, the force?
- meters per second (m/s)
- kilograms (kg)
- newtons (N)
- seconds (s)
In F = m × a, which unit goes with m, the mass, Pia?
- N
- m
- m/s²
- kg
Force arrow diagram, one dimension, arrows drawn to scale by size. A net force of 20 N speeds up Ren's 10 kg wagon at 2 m/s². If the net force doubles to 40 N, what happens?
- It moves at one fixed, faster speed
- Nothing changes, since the mass is the same
- The acceleration doubles to 4 m/s²
- The acceleration halves to 1 m/s²
Beside it: speeding up at 2 m/s². A steady 30 N net force acts on Zee's 15 kg cart for 3 s. What does the cart do during those 3 s?
- It slows down
- It stays still
- It moves at one steady speed
- It keeps speeding up