Which of the following does not describe a vector quantity? Hee are the choices:   A 900-kg mass A 900-kg mass A ball projected upward A ball projected upward Wind moving at 130 km/hr North of East Wind moving at 130 km/hr North of East A car traveling 100 km/hr along South superhighway

Two velocity vectors are defined as follows: ₁ = 40.0 m/s, 50.0° cw from the +x axis v₂ = 30.0 m/s, 75.0° cw from the -y axis a) b) Sketch the vector ₁ on an x-y grid. Label any relevant angle. Calculate the x- and y-components of ₁. Write the vector in terms of its components using unit vector notation. c) d) e) v₂ – v- Calculate the x- and y-components of the change in velocity defined as A = Write the vector Av in terms of its components using unit vector notation. Sketch the vector A on an x-y grid. Define a relevant angle symbolically whose numerical value you will calculate in the next part. f) g) Calculate the magnitude and direction of the vector Av. h) Finally, write the vector Av in terms of its magnitude and direction. Sketch the vector v₂ on an x-y grid. Label any relevant angle. Calculate the x- and y-components of 7₂. Write the vector ₂ in terms of its components using unit vector notation.

8. A car is moving north at a speed of 25 m/s. A child in the back seat of the car throws a toy to the passenger in the front seat with a speed of 10 m/s in the direction forward 50° right (relative to the car). a) Draw a vector diagram to illustrate the situation. b) Calculate the speed and direction of the toy relative to the road.

1. Other than displacement (x), list three vector quantities and define them (with words or equations) in terms of displacement (x).

Physics sample problems about vectors. Thought I knew how to do them but keep getting wrong answers.

2. You wake up one morning to find yourself in a strange room with opaque walls, and no visible doors or windows. You decide to do some experiments to find out more about your strange situation. you drop a ball from a height of 1.22 m above the floor. The ball hits the floor 0.349 s after your drop it. You guess that you must have been taken to an alien planet with gravity different from Earth s. What is this planet s g (that is, the magnitude of the acceleration due to gravity on this planet)?     20.0 m/s^2     10.0 m/s^2     15.0 m/s^2     30.0 m/s^2

6. Considering two vectors A and B subtended by an angle 0, the magnitude of A.B is a)|Ä||B|cos® b) |Ä||E]stn© cose d) none of these 7. Ifi is the unit vector of the X- axis then a) ixī = -1 b) ixĩ = 0 c) ixi = 1 d) ixi = 2 8. The average velocity of a moving particle is given by: Ax a) 25 b) At d) None Ax 9. A ball is thrown vertically upwards, at maximum high the velocity is: a) Minimum b) 0 c) maximum d) Vo 10. In the one-dimensional motion with constant acceleration (a), the final velocity is: a) v=Vo - at b) v=Vo + at c) v=Vo + at? d) v=v, - at?

Which of the following is a vector quantity? (K:1) Select one: O a. displacement O b. distance O c. speed O d. time

Would a “combination method” be possible, if you first divided the vectors into components and then added the components graphically? Would that give you the right answer?

2. Force vectors are given by equations F1 = 5i + 7j - 6k (kN) and F2 = -10k (kN). What is the direction of the resultant measured from the positive x-axis? Express your answer in unit of degrees.