G A4.1 Newtons Second Law

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F = ma:

1. What net force would accelerate a 2.50 kg mass at a rate of 27.6 m/s/s? <Video>

2. What mass accelerates at 6.50 m/s/s when a force of 87.0 N acts on it? <Video>

3. What is the acceleration of a 9.10 kg mass if there is a net force of 3.50 N acting on it? <Video>

(weight) F_g = mg: (Use g = 9.80 N/kg - round to three digits total)

4. What is the weight on earth of a 60.0 kg boy named Brennen? <Video>

5. What mass on earth weighs 730. N? <Video>

6. A 45.0 kg mass weighs 73.0 N on the moon. What is the "g" (The gravitational field strength) of the moon? <Video>

Kinematics then F = ma:

7. What net force would accelerate a 6.80 kg mass from rest a distance of 24.0 m in 5.00 s? <Video>

8. A 72.0 kg mass accelerates from 5.70 m/s to 18.0 m/s in 4.00 s. What net force acted? <Video>

9. A 12.0 kg mass accelerates from 6.20 m/s to 15.0 m/s over a distance of 21.0 m. What net force acted? <Video>

F = ma then Kinematics:

10. A 24.0 N net force acts on a 8.00 kg mass. If it accelerates from rest, what is the final velocity in 14.0 s? <Video>

11. A net force of 26.0 N acts on a 3.80 kg mass. After what time would the mass reach a speed of 27.0 m/s from rest? <Video>

12. A net force of 36.0 N acts on a 8.50 kg mass. What will be its displacement from rest if it accelerates for 4.10 s? <Video>

More Practice Assessments:

(Use g = 9.8 m/s/s - round to three digits total)

1. a. What is the weight of a 6.50 kg object on earth? FA4 1 Ex1 #a

b. What is the acceleration of a 2.80 kg object of there is 36.0 N of unbalanced force on it? FA4 1 Ex1 #a

c. What mass on earth weighs 164 N? 1:02 FA4 1 Ex1 #c

d. What net force would accelerate a 1.60 kg mass from rest a distance of 17.1 m in 2.90 s? 2:07 FA4 1 Ex1 #d

e. A 15.0 N net force acts on a 4.90 kg mass. If it accelerates from rest, what is the final velocity in 15.0 s? 2:03 FA4 1 Ex1 #e

2. a. What net force would accelerate a 37.5 kg mass at 2.45 m/s/s? 0:32 FA4 1 Ex2 #a

b. What mass accelerates at 2.98 m/s/s when a force of 19.9 N acts on it? 0:41 FA4 1 Ex2 #b

c. What is the weight on earth of a 65.0 kg boy named Brennen? 1:02 FA4 1 Ex2 #c

d. A 58.2 kg mass accelerates from 5.70 m/s to 25.3 m/s in 3.90 s. What net force acted? 1:51 FA4 1 Ex2 #d

e. A net force of 46.7 N acts on a 8.80 kg mass. What distance has it covered from rest when it has reached a speed of 15.2 m/s? 2:18 FA4 1 Ex2 #e

3. a. What mass on earth weighs 640. N?

b. What net force would accelerate a 18.0 kg mass at 3.20 m/s/s?

c. What mass would accelerate at 5.30 m/s/s when there is a net force of 77.0 N acting on it?

d. A net force of 12.5 N acts on a 2.80 kg mass. After what time would the mass reach a speed of 45.0 m/s from rest?

e. A 7.20 kg mass accelerates from 4.10 m/s to 17.8 m/s over a distance of 23.0 m. What net force acted?

4. a. What mass accelerates at 8.75 m/s/s when there is a net force of 19.4 N acting on it?

b. What is the weight of a 2.24 kg object on earth?

c. What is the acceleration of a 6.12 kg mass if there is a net force of 4.31 N acting on it?

d. A 5.10 kg mass accelerates from rest to a speed of 23.8 m/s in a distance of 53.0 m. What net force was needed?

e. A net force of 14.7 N acts on a 5.80 kg mass. What will be its displacement from rest if it accelerates for 3.70 s?

5. a. What is the acceleration of a 17.0 kg mass if there is a net force of 13.4 N acting on it?

b. What mass weighs 42.0 N on earth?

c. What net force would accelerate a 1.50 kg mass at 3.95 m/s/s?

d. A net force of 47.0 N acts on a 16.5 kg mass. In what time will it cover a distance of 14.0 m from rest?

e. A 47.0 kg mass accelerates from 3.90 m/s to 12.8 m/s in 4.10 s. What net force acted?

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