- #1
kevinius
- 5
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A 6N force pushes to gliders along an air track. The 200 g spring between the gliders is compressed. How much force does the spring exert on (a) glider A and (b) glider B?
Mass of Glider A = 400 g
Mass of Glider B = 600 g
I just want to verify that I solved this problem correctly. If I've made some mistake, please let me know.
3. I first set up my free body diagram for all three objects. Because the gliders are on the air track, friction is negligible. I also know that I don't have to consider forces in the y-direction because there is no acceleration there. Because both gliders are moving to the right, their acceleration is the same.
Find acceleration:
6N/(0.4 kg) = 15 m/s^2
Based on my free body diagram of the spring, the summation of the forces in the x-direction is:
F spring = F (s on B) - F (s on A) = m(s) * a
= F (s on B) - F (s on A) = (0.20 kg)(15 m/s^2)
= F (s on B) - F (s on A) = 3N
F (s on A) is equal to the F (A on s) = 6N
F (s on B) = 3N + 6N = 9N
Mass of Glider A = 400 g
Mass of Glider B = 600 g
I just want to verify that I solved this problem correctly. If I've made some mistake, please let me know.
3. I first set up my free body diagram for all three objects. Because the gliders are on the air track, friction is negligible. I also know that I don't have to consider forces in the y-direction because there is no acceleration there. Because both gliders are moving to the right, their acceleration is the same.
Find acceleration:
6N/(0.4 kg) = 15 m/s^2
Based on my free body diagram of the spring, the summation of the forces in the x-direction is:
F spring = F (s on B) - F (s on A) = m(s) * a
= F (s on B) - F (s on A) = (0.20 kg)(15 m/s^2)
= F (s on B) - F (s on A) = 3N
F (s on A) is equal to the F (A on s) = 6N
F (s on B) = 3N + 6N = 9N
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