Physics Homework Aid
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- Which statement is TRUE about the picture above? The spheres have only weight but no mass B The 40 Newton sphere has the greatest gravitational force C The smaller the weight the greater the gravitational force. D Although the weights of the spheres are different the gravitational forces are the same
- (1)Vectors defer from scalars , because __ (A)direction of scalars must he considered together with the magnitude, (B)direction of vectors must be considered in computing its magnitude direction of scalars can he represented with arrow-headed I lines,(D)because direction of vectors are following methods can be used to add or resolve vectors except:(10parallelogram nule (B)triangle rule,(C)rectangle rule,(D)method of Pythagoras.(3)II'a body in motion or at rest is in equilibrium,it means that __ (A)All the forces acting on it is equivalent to zero force(B)All the forces acting on it has a resultant(C)The resultant of all the forces closes the triangle when drawn head to tail(D)The resultant of all the forces closes the rectangle when drawn head to tail (4) Statics of particle defers from that of the rigid body in the following ways except __ :(A)Forces acting at a point are studied and the shape of the body is neglected(B)Moments are not considered in particle statics(C)The r rigid body y is treated as a combination of several particles(D)The forces and their turning effects are considered in rigid body statics (5)A force of 50N and 70N acts on a hook as shown in Fig. I, the correct triangle of force for the resultant is: (6) The resultant of the 70kN C forces in Figl of Question 5 is:(A)20.85K N 50kN D (B) 30.5 KN(C)40.81KN (D) 10025KN (7)A force 50kN 70kN A & B F shown in Fig. 2 can be resolved as __ in x- axis (A)F cos 0 (B)F sin 6 Fig 1 (C)F tan 6(D)F cot e (8)The support of the Engineering structure shown in Fig. 3 is called and it has the following reactions: Ay, Ax and M_(A) (A) Cantilever; 10KN.OKN and 50KNM (B)Fixed support; 10KN, OK N and 50KN (C) Cantilever; 50KNM 10KN, OKN (D) Ilinged support: 50KNM, x 10KN and OKN (9)The simple beam shown in l'ig 4.0 has the Fig5 following constraints As, A and B,(A)2SKN, 50 KN and 25KN (B)26K N Fig 2 60 and 25KN 50KN and 30KN JOOKN (D)60KN, 100KN and 50KN (10)For the simple beam shown in fig 5. find the reactions at the supports: A, A, and B. :(A)OKN , 6KN and 60 AKN (B)OKN. 4KN and 6K N (C)6KN, OKN and A B 4KN (D)4KN , 6KN and OKN(11)Fig_6 is a joint in a truss, calculate the value of the member force FAD(A ).OKN(B).8KN (C)9.OKN (D)-9.0KM (12)In lig 6, what is the value of the force sm FAB(A)12.52KN(B)-12.52KN(C)14.42KN(D)-14.42KN Fig 7.0 shows a gable roof truss, well numbered in bow's notations and a corresponding Maxwell's Cremona force diagram drawn. The scale of the force diagram is i.C. the length of the lines in centimeter represents the forces in Kiloncwtons. Use Pythagoras theorem where necessary and answer question 13-19 (13)The reaction at support (B):10KN/C)/2KN/DH+12KN(14)The reaction at support B is:(A)8KN(B 4.42KN(D)-14.42KN(15)The force in member AD is compression (B)9KN. compression(C)BKN.Tension (D)9KN, tension(16)The force in member DC is: (A)8K N. tension(B)9KN. compression(C)8KN, compression(D)9KN. tension(17)What is the force in member BD?(A)20KN,tension(B)20KN. compression (C)40KN, tension(D)40KN. 12cr compression(18)The force in member AB is(A)14.42kN, compression(B) 4442kV, tension(C)R.0kN tension(D)9.0kN Fig 6 (A)It is the study of the condition of rest of bodies acted upon by forces.(B)It studies the condition of equilibrium of stationary bodies acted upon by forces (c)It studies the condition of equilibrium of bodies acted upon by forces but moving with uniform velocity(D)All of the above (21) A mathematical expression possessing both magnitude and direction and added according to law is called(A)Scalars (B)Vectors (C) Quantities (D) All of the above(22) A force is given as F=250i+354j-250k what is its magnitu (B) 700 (C) 900 (D)1000 (23) lfa vector makes the following angles 73.49,116.4 and makes the following angles 31.0^circ withx. 0.860i+0.439j+0.781k 5)0.8601+0.43i-0.78ik(D)0.100i+2.404i-0.900k 500.860i+u_(2)+12i(O)50i+150i-45(8)5O_(1)+250j-55kF50kC (C) 10i+ P_(1)(20.0,60,100),P_(2)(40,130,150) express this force in space co 12.04i+60.72j+70k 60i+80j+10k(26) A vector makes the following angles x=40^circ ,y=70^circ and y axis,respectively; what angles does it E_(1)=20i+50i+10K,F_(2)=70i+10j-30k and F_(3)=xi+yi+zk are
- The SI base unit for temperature is the square
- The table below shows the masses of three asteroids orbiting a star. Assume that all three asteroids are the same distance from the star. Asteroid & Mass (10^15. kilograms ) Apus & 100 Carina & 205,000 Mon & 259,000 Which asteroid experiences the greatest gravitational force from the star? Choose 1 answer: (A) Apus (B) Carina (C) Mon
- How-many Caldicott principles are there? Choose one option then select Submit. Remember Choose 1 option 5 6 7 8