3-Forces - Practice Questions

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Arizona State University, Tempe *

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121

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Mechanical Engineering

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Feb 20, 2024

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1/31/17, 1’24 AM Assignment Previewer Page 1 of 9 https://www.webassign.net/v4cgityildiri@asu/assignments/preview…9&deployment=10669146&UserPass=e0057975e65f50a0db6d67e86c63e359 Question 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Description This MC quiz is for practice only; more questions may be added as the semester proceeds. PHY121-Introduction to Forces Practice Quiz (2795749) Due: Fri Feb 13 2015 05:02 PM MST 1. - Question Details UMassA2L1 3.P.001. [2097182] A bowling ball rolls down an alley and hits a bowling pin. Which statement below is true about the forces exerted during the impact? The bowling pin exerts a larger force on the ball than the ball does on the pin. The bowling ball exerts a larger force on the pin than the pin does on the ball. The force that they exert on each other is the same size. One of the two forces is larger, but which is larger can't be determined unless more information is provided. none of the above cannot be determined 2. - Question Details UMassA2L1 3.P.002. [2097157] The two blocks shown below are identical. In case A the block sits on a horizontal surface and in case B the block is in free fall. Which of the following statements are true regarding the reaction force to the gravitational force exerted on each block? In case A the reaction force is the normal force. In case B the reaction force is zero. The reaction force is larger in A than B . All the above are true. Only (1) & (2) are true. None of the above are true. cannot be determined
1/31/17, 1’24 AM Assignment Previewer Page 2 of 9 https://www.webassign.net/v4cgityildiri@asu/assignments/preview…9&deployment=10669146&UserPass=e0057975e65f50a0db6d67e86c63e359 3. - Question Details UMassA2L1 3.P.008. [2097235] A soccer ball rolls across the road and down a hill as shown below. Which of the following sketches of F y vs. t represents the net vertical force on the ball as a function of time? (Assume up is the + y -direction.) none of the above cannot be determined 4. - Question Details Duplicate of UMassA2L1 3.P.003. [2283919] Position vs. time graphs are given below for four different objects. Which of the objects experiences a net force sometime during the time period shown? ---Select--- only objects C and D
1/31/17, 1’24 AM Assignment Previewer Page 3 of 9 https://www.webassign.net/v4cgityildiri@asu/assignments/preview…9&deployment=10669146&UserPass=e0057975e65f50a0db6d67e86c63e359 5. - Question Details UMassA2L1 3.P.017. [2097155] Three blocks are stacked as shown below. How many forces are acting on the bottom block ( m 3 )? ---Select--- three forces 6. - Question Details UMassA2L1 3.P.026. [2097180] A person throws a ball straight up in the air. The ball rises to a maximum height and falls back down so that the person catches it. What forces are being exerted on the ball when it is half way to the maximum height? Ignore air resistance. ---Select--- the gravitational force only 7. - Question Details UMassA2L1 3.P.035. [2097188] A cart of mass 2 m collides and sticks to a cart of mass m that is initially at rest. Which cart exerts the larger force on the other? m 2 m They exert the same magnitude of force on each other. cannot be determined
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1/31/17, 1’24 AM Assignment Previewer Page 4 of 9 https://www.webassign.net/v4cgityildiri@asu/assignments/preview…9&deployment=10669146&UserPass=e0057975e65f50a0db6d67e86c63e359 8. - Question Details Y&FCQ5.05 [3148222] Two objects having masses m 1 and m 2 are connected to each other as shown in the figure and are released from rest. There is no friction on the table surface or in the pulley. The masses of the pulley and the string connecting the objects are completely negligible. What must be true about the tension T in the string just after the objects are released? T > m 2 g T = m 2 g T < m 2 g T < m 1 g T = m 1 g T > m 1 g
1/31/17, 1’24 AM Assignment Previewer Page 5 of 9 https://www.webassign.net/v4cgityildiri@asu/assignments/preview…9&deployment=10669146&UserPass=e0057975e65f50a0db6d67e86c63e359 9. - Question Details UMassA2L1 3.P.006. [2097209] Consider the three cases presented below. Assume the friction force between the table and block in situations (B) and (C) can be ignored. Which of the following statements about the tensions in the strings is true? T A = T B = T C T B = T C < T A T A < T B < T C T B < T C < T A T A = T C < T B none of the above The relationship of the tensions cannot be determined. 10. - Question Details UMassA2L1 3.P.007. [2097231] A marble rolls on to a piece of felt and slows down. Indicate the direction that most nearly corresponds to the direction of the force that the marble exerts on the felt. ---Select--- 3
1/31/17, 1’24 AM Assignment Previewer Page 6 of 9 https://www.webassign.net/v4cgityildiri@asu/assignments/preview…9&deployment=10669146&UserPass=e0057975e65f50a0db6d67e86c63e359 11. - Question Details UMassA2L1 3.P.015. [2097361] Consider the arrangement of pulleys and masses shown below. The masses of the pulleys are small. Ignore friction. For what relationship of the masses would the masses remain at rest? none of the above cannot be determined > 2 m M = 2 m M = 1.5 m M = 1 m M = 0.5 m M = 0.25 m M < 0.25 m M 12. - Question Details UMassA2L1 3.P.018. [2097295] A small ball is released from rest at position A and rolls down a vertical circular track under the influence of gravity. When the ball reaches position B , which of the indicated directions most nearly corresponds to the direction of the normal force on the ball? ---Select--- 1
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1/31/17, 1’24 AM Assignment Previewer Page 7 of 9 https://www.webassign.net/v4cgityildiri@asu/assignments/preview…9&deployment=10669146&UserPass=e0057975e65f50a0db6d67e86c63e359 13. - Question Details UMassA2L1 3.P.019. [2097122] Consider the two situations presented below. T 1 is the tension in the string in case A and T 2 is the tension in the string in case B . Which of the following statements is correct? T 1 < T 2 T 1 = T 2 T 1 > T 2 cannot be determined 14. - Question Details UMassA2L1 3.P.023. [2097158] A thin wire is stretched horizontally between two walls. If a weight, W , is hung on the wire, what is true about the tension, T , in the wire? T < W T = W T > W The relationship between T and W cannot be determined.
1/31/17, 1’24 AM Assignment Previewer Page 8 of 9 https://www.webassign.net/v4cgityildiri@asu/assignments/preview…9&deployment=10669146&UserPass=e0057975e65f50a0db6d67e86c63e359 15. - Question Details UMassA2L1 3.P.033. [2097082] Block m 1 sits on block m 2 and both sit on the floor of an elevator at rest. When the elevator starts to move down, the normal force on the upper block will increase. remain the same. decrease. cannot be determined 16. - Question Details UMassA2L1 3.P.038. [2097352] A string attached to an 8 kg mass is passed over a frictionless pulley and attached to a 2 kg mass as shown. What is the normal force on the 8 kg block? (Use g =10 N/kg. Select the magnitude of the normal force.) ---Select--- 60 N
1/31/17, 1’24 AM Assignment Previewer Page 9 of 9 https://www.webassign.net/v4cgityildiri@asu/assignments/preview…9&deployment=10669146&UserPass=e0057975e65f50a0db6d67e86c63e359 Name (AID): PHY121-Introduction to Forces Practice Quiz (2795749) Submissions Allowed: 5 Category: Practice Code: Locked: Yes Author: Adams, Gary B. ( gary.adams@asu.edu ) Last Saved: Jan 20, 2017 01:45 PM MST Group: MecTB-Kinematics Randomization: Person Which graded: Last Before due date Question Score Assignment Score Publish Essay Scores Question Part Score Mark Add Practice Button Response Save Work After due date Question Score Assignment Score Publish Essay Scores Key Question Part Score Solution Mark Add Practice Button Response Feedback Settings Assignment Details 17. - Question Details UMassA2L1 3.P.039. [2097165] A string attached to an 8 kg mass is passed over a frictionless pulley and attached to a 2 kg mass as shown. What is the tension in the rope supporting the pulley? (Use g = 10 N/kg.) ---Select--- 40 N
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