Advertisements
Advertisements
प्रश्न
Pick out the only vector quantity in the following list:
विकल्प
Temperature
Pressure
Impulse
Time
Power
Total path length
Energy
Gravitational potential
Coefficient of friction
Charge
उत्तर
Impulse
Explanation:
Impulse is given by the product of force and time. Since force is a vector quantity, its product with time (a scalar quantity) gives a vector quantity.
APPEARS IN
संबंधित प्रश्न
State with reasons, whether the following algebraic operations with scalar and vector physical quantities are meaningful:
- adding any two scalars,
- adding a scalar to a vector of the same dimensions,
- multiplying any vector by any scalar,
- multiplying any two scalars,
- adding any two vectors,
- adding a component of a vector to the same vector.
Read the statement below carefully and state with reason, if it is true or false:
The total path length is always equal to the magnitude of the displacement vector of a particle.
Read statement below carefully and state, with reasons and examples, if it is true or false:
A scalar quantity is one that has the same value for observers with different orientations of axes
The angle between A = `hati` + `hatj` and B = `hati` − `hatj` is ______.
Three vectors A, B and C add up to zero. Find which is false.
Following are four differrent relations about displacement, velocity and acceleration for the motion of a particle in general. Choose the incorrect one (s):
- `v_(av) = 1/2 [v(t_1) + v(t_2)]`
- `v_(av) = (r(t_2) - r(t_1))/(t_2 - t_1)`
- `r = 1/2 (v(t_2) - v(t_1))(t_2 - t_1)`
- `a_(av) = (v(t_2) - v(t_1))/(t_2 - t_1)`
If |A| = 2 and |B| = 4, then match the relations in column I with the angle θ between A and B in column II.
| Column I | Column II |
| (a) A.B = 0 | (i) θ = 0 |
| (b) A.B = + 8 | (ii) θ = 90° |
| (c) A.B = 4 | (iii) θ = 180° |
| (d) A.B = – 8 | (iv) θ = 60° |
The magnitude of vectors `vec"A"`, `vec"B"` and `vec"C"` are respectively 12, 5 and 13 units and `vec"A"` + `vec"B"` = `vec"C"`, then the angle between `vec"A"` and `vec"B"` is ______.
If the projection of `2hat"i"+4hat"j"-2hat"k"` on `hat"i"+ 2hat"j"+alphahat"k"` is zero. Then, the value of α will be ______.
A force `vec"F"=(hat"i"+2hat"j"+3hat"k")`N acts at a point `(4hat"i"+3hat"j"-hat"k")`m. Then the magnitude of torque about the point `(hat"i" + 2hat"j" + hat"k")` m will be `sqrtx` N-m. The value of x is ______.
