ScienceAges 13-15

Force, mass & acceleration

Use Newton’s second law (F = ma) to calculate resultant force from mass and acceleration. Review suitability for your learners before teaching.

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Age band:Ages 13-15 Ages 16-18

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Worksheet StudioPractice pack · Ages 13-15

Force, mass & acceleration

Take your time. Show your thinking.

1. An object of mass 39 kg accelerates at 10 m/s². Use F = ma to find the resultant force.
39 kg → a = 10 m/s² · F = m × a = ?
2. An object of mass 23 kg accelerates at 5 m/s². Use F = ma to find the resultant force.
23 kg → a = 5 m/s² · F = m × a = ?
3. An object of mass 5 kg accelerates at 2 m/s². Use F = ma to find the resultant force.
5 kg → a = 2 m/s² · F = m × a = ?
4. An object of mass 28 kg accelerates at 2 m/s². Use F = ma to find the resultant force.
28 kg → a = 2 m/s² · F = m × a = ?
5. An object of mass 24 kg accelerates at 4 m/s². Use F = ma to find the resultant force.
24 kg → a = 4 m/s² · F = m × a = ?
6. An object of mass 23 kg accelerates at 14 m/s². Use F = ma to find the resultant force.
23 kg → a = 14 m/s² · F = m × a = ?
7. An object of mass 8 kg accelerates at 10 m/s². Use F = ma to find the resultant force.
8 kg → a = 10 m/s² · F = m × a = ?
8. An object of mass 25 kg accelerates at 9 m/s². Use F = ma to find the resultant force.
25 kg → a = 9 m/s² · F = m × a = ?
9. An object of mass 37 kg accelerates at 10 m/s². Use F = ma to find the resultant force.
37 kg → a = 10 m/s² · F = m × a = ?
10. An object of mass 34 kg accelerates at 9 m/s². Use F = ma to find the resultant force.
34 kg → a = 9 m/s² · F = m × a = ?
11. An object of mass 20 kg accelerates at 13 m/s². Use F = ma to find the resultant force.
20 kg → a = 13 m/s² · F = m × a = ?
12. An object of mass 22 kg accelerates at 9 m/s². Use F = ma to find the resultant force.
22 kg → a = 9 m/s² · F = m × a = ?

12 questions · Seed 42 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 13-15

Force, mass & acceleration

Answers and reasoning. Review before teaching.

1. An object of mass 39 kg accelerates at 10 m/s². Use F = ma to find the resultant force.
390 N
Resultant force F = m × a = 39 × 10 = 390 N.
2. An object of mass 23 kg accelerates at 5 m/s². Use F = ma to find the resultant force.
115 N
Resultant force F = m × a = 23 × 5 = 115 N.
3. An object of mass 5 kg accelerates at 2 m/s². Use F = ma to find the resultant force.
10 N
Resultant force F = m × a = 5 × 2 = 10 N.
4. An object of mass 28 kg accelerates at 2 m/s². Use F = ma to find the resultant force.
56 N
Resultant force F = m × a = 28 × 2 = 56 N.
5. An object of mass 24 kg accelerates at 4 m/s². Use F = ma to find the resultant force.
96 N
Resultant force F = m × a = 24 × 4 = 96 N.
6. An object of mass 23 kg accelerates at 14 m/s². Use F = ma to find the resultant force.
322 N
Resultant force F = m × a = 23 × 14 = 322 N.
7. An object of mass 8 kg accelerates at 10 m/s². Use F = ma to find the resultant force.
80 N
Resultant force F = m × a = 8 × 10 = 80 N.
8. An object of mass 25 kg accelerates at 9 m/s². Use F = ma to find the resultant force.
225 N
Resultant force F = m × a = 25 × 9 = 225 N.
9. An object of mass 37 kg accelerates at 10 m/s². Use F = ma to find the resultant force.
370 N
Resultant force F = m × a = 37 × 10 = 370 N.
10. An object of mass 34 kg accelerates at 9 m/s². Use F = ma to find the resultant force.
306 N
Resultant force F = m × a = 34 × 9 = 306 N.
11. An object of mass 20 kg accelerates at 13 m/s². Use F = ma to find the resultant force.
260 N
Resultant force F = m × a = 20 × 13 = 260 N.
12. An object of mass 22 kg accelerates at 9 m/s². Use F = ma to find the resultant force.
198 N
Resultant force F = m × a = 22 × 9 = 198 N.

12 questions · Seed 42 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Force, mass & acceleration

Take your time. Show your thinking.

1. An object of mass 39 kg accelerates at 10 m/s². Use F = ma to find the resultant force.
39 kg → a = 10 m/s² · F = m × a = ?
2. An object of mass 23 kg accelerates at 5 m/s². Use F = ma to find the resultant force.
23 kg → a = 5 m/s² · F = m × a = ?
3. An object of mass 5 kg accelerates at 2 m/s². Use F = ma to find the resultant force.
5 kg → a = 2 m/s² · F = m × a = ?
4. An object of mass 28 kg accelerates at 2 m/s². Use F = ma to find the resultant force.
28 kg → a = 2 m/s² · F = m × a = ?
5. An object of mass 24 kg accelerates at 4 m/s². Use F = ma to find the resultant force.
24 kg → a = 4 m/s² · F = m × a = ?
6. An object of mass 23 kg accelerates at 14 m/s². Use F = ma to find the resultant force.
23 kg → a = 14 m/s² · F = m × a = ?
7. An object of mass 8 kg accelerates at 10 m/s². Use F = ma to find the resultant force.
8 kg → a = 10 m/s² · F = m × a = ?
8. An object of mass 25 kg accelerates at 9 m/s². Use F = ma to find the resultant force.
25 kg → a = 9 m/s² · F = m × a = ?
9. An object of mass 37 kg accelerates at 10 m/s². Use F = ma to find the resultant force.
37 kg → a = 10 m/s² · F = m × a = ?
10. An object of mass 34 kg accelerates at 9 m/s². Use F = ma to find the resultant force.
34 kg → a = 9 m/s² · F = m × a = ?
11. An object of mass 20 kg accelerates at 13 m/s². Use F = ma to find the resultant force.
20 kg → a = 13 m/s² · F = m × a = ?
12. An object of mass 22 kg accelerates at 9 m/s². Use F = ma to find the resultant force.
22 kg → a = 9 m/s² · F = m × a = ?

12 questions · Seed 42 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Force, mass & acceleration

Answers and reasoning. Review before teaching.

1. An object of mass 39 kg accelerates at 10 m/s². Use F = ma to find the resultant force.
390 N
Resultant force F = m × a = 39 × 10 = 390 N.
2. An object of mass 23 kg accelerates at 5 m/s². Use F = ma to find the resultant force.
115 N
Resultant force F = m × a = 23 × 5 = 115 N.
3. An object of mass 5 kg accelerates at 2 m/s². Use F = ma to find the resultant force.
10 N
Resultant force F = m × a = 5 × 2 = 10 N.
4. An object of mass 28 kg accelerates at 2 m/s². Use F = ma to find the resultant force.
56 N
Resultant force F = m × a = 28 × 2 = 56 N.
5. An object of mass 24 kg accelerates at 4 m/s². Use F = ma to find the resultant force.
96 N
Resultant force F = m × a = 24 × 4 = 96 N.
6. An object of mass 23 kg accelerates at 14 m/s². Use F = ma to find the resultant force.
322 N
Resultant force F = m × a = 23 × 14 = 322 N.
7. An object of mass 8 kg accelerates at 10 m/s². Use F = ma to find the resultant force.
80 N
Resultant force F = m × a = 8 × 10 = 80 N.
8. An object of mass 25 kg accelerates at 9 m/s². Use F = ma to find the resultant force.
225 N
Resultant force F = m × a = 25 × 9 = 225 N.
9. An object of mass 37 kg accelerates at 10 m/s². Use F = ma to find the resultant force.
370 N
Resultant force F = m × a = 37 × 10 = 370 N.
10. An object of mass 34 kg accelerates at 9 m/s². Use F = ma to find the resultant force.
306 N
Resultant force F = m × a = 34 × 9 = 306 N.
11. An object of mass 20 kg accelerates at 13 m/s². Use F = ma to find the resultant force.
260 N
Resultant force F = m × a = 20 × 13 = 260 N.
12. An object of mass 22 kg accelerates at 9 m/s². Use F = ma to find the resultant force.
198 N
Resultant force F = m × a = 22 × 9 = 198 N.

12 questions · Seed 42 · Age guidance, not curriculum certification