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The Assessment Solved:
1. What is the acceleration of a 4.39 kg mass if there is an net force of 12.5 N on it?
(2.85 m/s/s)
2. What is the mass of an object that weighs 764 N on earth?
(77.9 kg)
3. What net force would accelerate a 2.10 kg mass at 7.80 m/s/s?
(16.4 N)
4. What net force would accelerate a 0.145 kg baseball from rest to 38.0 m/s in a distance of 0.985 m?
(106 N)
5. If there is a net force of 42.0 N on a 3.60 kg mass, what time would it cover 37.0 m from rest?
(2.52 s)
Help with the Quizlette:
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) Fg = mg: (Use g = 9.81 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>
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