Q11. As shown in the image below, the 39-kg block A and the 43-kg block B connected by the weightless, frictionless pulley system are released from rest. If initially the total combined potential energy of blocks A and B is 0, what is their combined potential energy when block A has displaced downwards by 0.6 m? Negative sign must be included if the energy is negative. Please pay attention: the numbers may change since they are randomized. Your answer must include 1 place after the decimal point, and include proper SI unit. Take g = 9.81 m/s². A Your Answer: Answer OF B units

Q11. As shown in the image below, the 39-kg block A and the 43-kg block B connected by the weightless, frictionless pulley system are released from rest. If initially the total combined potential energy of blocks A and B is 0, what is their combined potential energy when block A has displaced downwards by 0.6 m? Negative sign must be included if the energy is negative. Please pay attention: the numbers may change since they are randomized. Your answer must include 1 place after the decimal point, and include proper SI unit. Take g = 9.81 m/s². A Your Answer: Answer OF B units

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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F = (C · t²) Q14. As shown in the image below, the force acting on the box is N, where constant C = 10 and t is time in s. Determine the magnitude of the total impulse (in N.s) done by force F to the box during the period from t = 0 to t = 1.5 s. Please pay attention: the numbers may change since they are randomized. Your answer must include 2 places after the decimal point. F Your Answer: Answer 3 5 4
2.) Figure (a) below shows a time variation of the force (P) which is applied on a block which weighs 25 lb as shown in Figure (b). Assume that the block is initially at rest and μk = μs = 0.15 a.Find the time at which the body start to move b.Find the velocity of the body after 3 seconds.
Question 3: Objects A and B are connected by a rope with fixed length of 7 ft. They start moving from rest at x = 0, being pulled by the constant 20-lb force. If the coefficient of kinetic friction 4 is 0.2 between both objects A, B and the contacting surface, what is the speed of object B when x = 4 ft? Neglect the friction at the pulley. WB= 20 lb B 3 ft x = 4 ft 20 lb W 12 lb
Q14. As shown in the image below, the force acting on the box is F = (C · t²) N, where constant C = 3 and tis time in s. Determine the magnitude of the total impulse (in N-s) done by force Fto the box during the period from t= 0 to t= 1.4 s. Please pay attention: the numbers may change since they are randomized. Your answer must include 2 places after the decimal point. F 4 Your Answer: Answer
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Q22. As shown in the image below, the force acting on the 5-kg crate is a function of time. The coefficient of kinetic friction between the crate and the surface is uk = 0.15. Determine the magnitude of the horizontal impulse (in N-s) done by all external forces to the crate during the period from t = 0 to t= 2.3 s. Please pay attention: the numbers may change since they are randomized. Your answer must include 2 places after the decimal point. Take g = 9.81 m/s2. %3D F = (201² +30) N (t in second) F = F. 30 V1 Your Answer: Answer
Part A The 150 lb man lies against the cushion for which the coefficient of static fricton is , 05 He rotates about the z axis with a constant speed v= 25 ft/s (Eigure 1) Delermine the smallest angle 0 of the cushion at which he will begin to sip of Express your answer using three significant figures. VO AY4 | It vec Figure Submit RequestAnswer Provide Feedback
23-A truck of mass 5 tonnes was moving with a velocity of 110 km/hr. The brakes were applied to bring the truck to 25 km/hr in 7.5 seconds . Determine the uniform force exerted by the brakes. Also find the velocity it will reach if the same force is applied in the same direction for 750 m and also find the time taken. The uniform force exerted by the brakes in N is The velocity it will reach if the same force is applied in the same direction for 750 m in m/s is The time taken if the same force is applied in the same direction in seconds is
Question 9– answer all parts A heavy goods vehicle of total mass 4.8 tonnes descends a hill with a gradient of 8 degrees from the horizontal. During this motion, the vehicle experiences a rolling resistance to its motion of 880 N. Whilst travelling at a velocity of 72 km/h, its brakes are applied, and the truck is brought uniformly to rest in a distance of 140 m. During this period of constant deceleration, it may be assumed that the rolling resistance remains constant at 88ON, this being in addition to the retarding force applied by the brakes. Calculate for the vehicle whilst it is slowing down: a) The vertical height through which it descends. b) Its decrease in potential energy. c) Its initial velocity in m/s. Its decrease in kinetic energy. -------------------- ---------------- -------------- ---------
Q1. A ball is shot vertically into the air at a velocity of 58.9 m per sec. After 4 sec, another ball is shot vertically into the air. What initial velocity must the second ball have in order to meet the first ball 17.8 m from the ground?
I need a clear answer by hand, not by keyboard and fast answer within 20 minutes. Thank you | dybala The system is initially at rest with no slack in the cable, and the mass and friction of the pulleys are negligible. Determine the following: 1- The acceleration of the block if (a) T = 20 N and (b) T= = 30 N. 2- The velocity of the block in 4 seconds if T = 30 N. Hs=0.50 H=0.40) 15 kg 30° T