Home
Class 12
PHYSICS
A bird moves from point (1, -2, 3) to (4...

A bird moves from point `(1, -2, 3)` to `(4, 2, 3)`. If the speed of the bird id `10 m//s`, then the velocity of the bird is :-

A

`5(hati-2hatj+3hatk)`

B

`5(4hati+2hatj+3hatk)`

C

`0.6hati+0.8hatj`

D

`6hati+8hatj`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • VECTOR & CALCULUS

    MOTION|Exercise EXERCISE -4 (LEVEL - I) PREVIOUS YEAR|22 Videos
  • VECTOR

    MOTION|Exercise Exercise - 3|18 Videos
  • WAVE MOTION

    MOTION|Exercise Exercise - 3 Section - B (Previous Years Problems)|7 Videos

Similar Questions

Explore conceptually related problems

A bird moves from point (1, -2) to (4, 2) . If the speed of the bird is 10m//sec , then find the velocity vector of the bird ?

A bird moves from point (1 m, -2 m, 3 m) to (4 m, 2 m, 3 m) . If the speed of the bird is 10 m//s , then the velocity vector of the bird in m//s is:

A bird flies to and fro between two cars which moves with velocities v_1 = 20 m//s and v_2 = 30 m//s . If the speed of the bird is v_3 = 10 m//s and the initial distance of separation between them is d = 2 km , find the total distance covered by the bird till the cars meet.

A bird flies from (-3m, 4m, -3 m) to (7m, -2m, -3m) in the xyz-coordinates. The bird's displacement vector is given by

A bird is sitting on the top of a vertical pole 20 m high and its elevation from a point O on the ground is 45o . It flies off horizontally straight away from the point O. After one second, the elevation of the bird from O is reduced to 30o . Then the speed (in m/s) of the bird is (1) 40(sqrt(2)-1) (2) 40(sqrt(3)-2) (3) 20""sqrt(2) (4) 20(sqrt(3)-1)

A bird flies to and fro between two cars wich move with velocities v_(1) and v_(2) , If the speed of the bird is v_(3) and the initial distance ofseparation between then is d , find the total distance covered bythe bird till the cars meet. .

A naughty bird is sitting on top of a car. It sees another car approaching it at a distance of 12 km. The speed of the two cars is 60 km/hr each. The bird starts flying from the first car and moves towards the second car, reaches the second car and comes back to the first car and so on. If the speed at which the bird flies is 120 km/hr. The total distance travelled by the bird. (Assume that the two cars have a crash)

A fish is moving up vertically with speed 4 cm/s inside a pond. A bird is moving vertically downward (see figure). Velocity of the bird w.r.t. fish is 16 cm/s downward. Find out the actual velocity of the bird (in cm/s). Given refractive index of water is (4)/(3) .

A bird flies from (-3 m,4 m,-3 m ) to (7 m, -2 m, -3 m) in XYZ co-ordinates. The bird's displacement in unit vectors is given by

If velocity of bird (B) in downward direction with respect to surface (water and air) is 3m/s. Then what is the velocity of bird (B) with respect to fish (F) ? (._(a)mu_(w) = (4)/(3))