Unit test for grade 11 unit two in 2022, Quizzes of Physics

Download Unit test for grade 11 unit two in 2022 and more Quizzes Physics in PDF only on Docsity! Grade 11 Physics Unit 2 Test (15%) 1 Number of Items: 13 Time Allowed: 50 Min DIRECTIONS: I. Each of the following questions is followed by four possible alternatives. Read each question and carefully write only the letter of your choice on the separate answer sheet provided. (Each 1mark’s) 1. Identify the following quantities as scalar or vector: the mass of an object, the number of leaves on a tree, wind velocity. A. Vector, scalar, scalar B. Vector, scalar, vector C. Scalar, scalar, vector D. Scalar, vector, vector 2. A vector that tells whose magnitude is one refers to? A. coplanar vector C. position vector B. unit vector D. concurrent vector 3. Which of the following is the condition for two vectors to be Collinear? A. The vectors should be parallel to the same line B. The vectors should have the same initial point C. The vectors should have the same magnitude D. The vectors should have the magnitude 1 and 0 respectively 4. . If a⃗ =i+4j and b⃗ =3i-3j. Find the magnitude of a⃗ +b⃗ A. .√6 B. √11 C. √5 D. √17 5. If 2i+j−2k and 2i−4j+λk are perpendicular to each other, then λ is equal to: A. -2 B. 1 C. 0 D. -1 6. Find 5v – 2w if v = -2i + 5j and w = 3i – 7j A. –16i – 39j B. 16i + 39j C. 16i – 39j D. –16i + 39j 7. Find the unit vector that has the same direction as w = 4i – 5j. A. − 4𝑖 √41 + 5𝑗 √41 B. 4𝑖 √41 − 5𝑗 √41 C. − 4𝑖 √41 − 5𝑗 √41 D. 4𝑖 √41 + 5𝑗 √41 8. 9. Two vectors A and B are such that ∣A+B∣=∣A−B∣. What is the angle between A and B? A. 0 B. 90 C. 60 D. 180 10. If A = i+ j+ k, and B = 2i+ 3j− k, find A× B. A. 4i+ 3j+ k B. -4 i - j+3k C. - 4i + j - 3k D. -4i + j +3k Grade 11 Physics Unit 2 Test (15%) 2 DIRECTIONS: II. Work out the following by including all the necessary steps. . (Each 1.6 mark’s) 11. If A = I − 3j+ 2k and B = −2i+ 6j − 4k, find A× B and what can you say about A and B? 12. If A is the point (5, 0), B is the point (3, 0), find the area of the triangle OAB. 13. Find the volume of the parallelepiped determined by the vectors a · (b x c). If a = (6,3,-4)m, b = (0,2,1)m, c = (5,-1,2)m