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Newton's laws 2
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I really seek for help. I want to understand but I couldn't. I need some help to understand from this question. I think I have to use the formula F=ma but I don't know if that is right or wrong. Three forces acting on an object are given by F1 = (-2.00i + 2.00j) N, F2 = (5.00i-3.00j) N, F3=... 顯示更多 I really seek for help. I want to understand but I couldn't. I need some help to understand from this question. I think I have to use the formula F=ma but I don't know if that is right or wrong. Three forces acting on an object are given by F1 = (-2.00i + 2.00j) N, F2 = (5.00i-3.00j) N, F3= (-45.0i)N. The object experiences an acceleration of magnitude 3.75m/s^2. (a) What is the direction of the acceleration? (b) What is the mass of the object? (c) If the object is initially at rest, what is its speed after 10 s? (d) What are the velocity components of the object after 10s? Thank you
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其他解答:
Newton's laws 2
發問:
I really seek for help. I want to understand but I couldn't. I need some help to understand from this question. I think I have to use the formula F=ma but I don't know if that is right or wrong. Three forces acting on an object are given by F1 = (-2.00i + 2.00j) N, F2 = (5.00i-3.00j) N, F3=... 顯示更多 I really seek for help. I want to understand but I couldn't. I need some help to understand from this question. I think I have to use the formula F=ma but I don't know if that is right or wrong. Three forces acting on an object are given by F1 = (-2.00i + 2.00j) N, F2 = (5.00i-3.00j) N, F3= (-45.0i)N. The object experiences an acceleration of magnitude 3.75m/s^2. (a) What is the direction of the acceleration? (b) What is the mass of the object? (c) If the object is initially at rest, what is its speed after 10 s? (d) What are the velocity components of the object after 10s? Thank you
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Three forces acting on an object are given by F1 = (-2.00i + 2.00j) N, F2 = (5.00i-3.00j) N, F3= (-45.0i)N. The object experiences an acceleration of magnitude 3.75m/s^2. (a) What is the direction of the acceleration? Net force, F = F1+F2+F3 = (-2.00i + 2.00j) N + (5.00i-3.00j) N + (-45.0i)N = (-42i - j) N Therefore direction of acceleration is along -42i-j (b) What is the mass of the object? Mass, m = F/a = sqrt[(-42)^2 + (-1)^2] / 3.75 = 11.203kg (c) If the object is initially at rest, what is its speed after 10 s? v = u + at Speed, v = 0 + (3.75)(10) = 37.5m/s (d) What are the velocity components of the object after 10s? Velocity = 37.5 (-42i - j)/sqrt[(-42)^2 + (-1)^2] = (-37.49i - 0.88j ) m/s其他解答:
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