12. [-/10 Points] DETAILS SERPSE10 5.7.P.022. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An object of mass m, = 3.50 kg placed on a frictionless, horizontal table is connected to a string that passes over a pulley and then is fastened to a hanging object of mass m, = 6.70 kg as shown in the figure. (a) Draw free-body diagrams of both objects. This answer has not been graded yet. (b) Find the magnitude of the acceleration of the objects. m/s2 (c) Find the tension in the string. N Need Help? Read It Watch It2. [-/10 Points] DETAILS SERPSE10 5.4.OP.001.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A toy rocket engine is securely fastened to a large puck that can glide with negligible friction over a horizontal surface, taken as the xy plane. The 4.80-kg puck has a velocity of 1.20i m/s at one instant. Eight seconds later, its velocity is (6.001 + 6.0j) m/s. (a) Assuming the rocket engine exerts a constant horizontal force, find the components of the force. + j ) N (b) Find its magnitude. N Need Help? Read It Master It4. [-/10 Points] DETAILS SERPSE10 5.4.OP.005. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A force F applied to an object of mass m, produces an acceleration of 3.40 m/s". The same force applied to a second object of mass m, produces an acceleration of 1.30 m/s2. (a) What is the value of the ratio m,/m2? (b) If m, and my are combined into one object, find its acceleration under the action of the force F. m/s2 Need Help? Read It Watch It 5. [-/10 Points] DETAILS SERPSE10 5.4.OP.006.MI.SA. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise Two forces F, and F, act on a 7.90-kg object. F, = 22.0 N and F, = 15.5 N. 90.0 60.0 - F F a b (a) Find the acceleration of the object for the configuration of forces shown in Figure (a). (b) Find the acceleration of the object for the configuration of forces shown in Figure (b). Click here to begin! Need Help? Read It6. [-/10 Points] DETAILS SERPSE10 5.4.P.007. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Three forces acting on an object are given by F, = (-1.81 + 6.30j) N, F2 = (5.101 - 1.55j) N, and F3 = (-41.50) N. The object experiences an acceleration of magnitude 3.80 m/s2. (a) What is the direction of the acceleration? (counterclockwise from the +x-axis) (b) What is the mass of the object? kg (c) If the object is initially at rest, what is its speed after 20.0 s? m/s (d) What are the velocity components of the object after 20.0 s? (Let the velocity be denoted by v.) i+ i m/s Need Help? Read it Watch It 7. [-/10 Points] DETAILS SERPSE10 5.5.P.011.MI.SA. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise An electron of mass 9.11 x 10 91 kg has an initial speed of 2.30 x 103 m/s. It travels in a straight line, and its speed increases to 6.50 x 103 m/s in a distance of 4.30 cm. Assume its acceleration is constant. (a) Determine the magnitude of the force exerted on the electron. (b) Compare this force with the weight of the electron, which we ignored. Click here to begin! Need Help? Read It