Zero Vector

Q. If multiple vectors cancel out then what do we get ?

1. 0
2. 0 vector
3. \N
4. \N

Q. Which of the following is a null vector?

1. Velocity vector of a body moving in a circle with a uniform speed
2. Velocity vector of a body moving in a straight line with a uniform speed
3. Position vector of the origin of a rectangular coordinate system
4. Displacement vector of a stationary object
   

Q. A null vector has

1. zero magnitude and a specific direction
2. a finite magnitude and no specific direction
3. a finite magnitude and a specific direction
4. zero magnitude and no specific direction

Q.

Two vectors $\overrightarrow{A}$ and $\overrightarrow{B}$ lie in a plane, another vector $\overrightarrow{C}$ lies outside this plane, then the resultant of these three vectors i.e., $\overrightarrow{A}+\overrightarrow{B}+\overrightarrow{C}$

1. Lies in the plane containing $\overrightarrow{A}+\overrightarrow{B}$

2. Lies in the plane containing $\overrightarrow{C}$

3. Can be zero

4. Cannot be zero

Q. 100 coplanar forces each equal to 10 N act on a body. Each force makes angle $\frac{\pi }{50}$ with the preceding force. What is the resultant of the forces

1. 250 N
2. Zero
3. 1000 N
4. 500 N

Q. How many minimum number of coplanar vectors having different magnitudes can be added to give zero resultant

1. 3
2. 5
3. 4
4. 2

Q.

A null vector has

1. zero magnitude and no specific direction.

2. a finite magnitude and no specific direction

3. a finite magnitude and a specific direction

4. zero magnitude and a specific direction

Q. A metal sphere is hung by a string fixed to a wall. The sphere is pushed away from the wall by a stick. The forces acting on the sphere are shown in the second diagram. Which of the following statements is wrong

1. none of these
2. P = W tan $\theta$
3. T= P+W
4. $T^2$ = $P^2$ + $W^2$

Q. zero vector = * vector

1. Zero
2. Zero vector
3. None of these

Q. Zero vector can be considered as a scalar because its magnitude is zero and direction is not defined.

1. True
2. False