Advertisements
Advertisements
प्रश्न
In a two dimensional motion, instantaneous speed v0 is a positive constant. Then which of the following are necessarily true?
विकल्प
The acceleration of the particle is zero.
The acceleration of the particle is bounded.
The acceleration of the particle is necessarily in the plane of motion.
The particle must be undergoing a uniform circular motion.
उत्तर
The acceleration of the particle is necessarily in the plane of motion.
Explanation:
The acceleration of the particle will necessarily be zero and in the plane of motion because the given speed is constant and positive, i.e. in the direction of force.
APPEARS IN
संबंधित प्रश्न
On an open ground, a motorist follows a track that turns to his left by an angle of 60° after every 500 m. Starting from a given turn, specify the displacement of the motorist at the third, sixth and eighth turn. Compare the magnitude of the displacement with the total path length covered by the motorist in each case.
In a harbour, wind is blowing at the speed of 72 km/h and the flag on the mast of a boat anchored in the harbour flutters along the N-E direction. If the boat starts moving at a speed of 51 km/h to the north, what is the direction of the flag on the mast of the boat?
For any arbitrary motion in space, state whether the following statement is true:
`"a"_"average"=["v"("t"_2) - "v"("t"_1)]/("t"_2 - "t"_1)`
(The ‘average’ stands for average of the quantity over the time interval t1 to t2)
For any arbitrary motion in space, state whether the following statement is true:
`"V"_"average"` = [r(t2) - r(t1) ] /(t2 – t1)
For any arbitrary motion in space, state whether the following statement is true:
`"r"("t") = "r"(0) + "v"(0)"t" + 1/2 "a" "t"^2 `
(The ‘average’ stands for average of the quantity over the time interval t1 to t2)
A small toy starts moving from the position of rest under constant acceleration. If it travels a distance of 10 minutes, the distance travelled by the toy in the next will be ______.
Two vectors `vec"A"` and `vec"B"` have equal magnitudes. If magnitude of `vec"A"` + `vec"B"` is equal to two times the magnitude of `vec"A"` - `vec"B"`, then the angle between `vec"A"` and `vec"B"` will be :
A person can throw a ball up to a maximum range of 100 m. How high above the ground he can throw the same ball?
The position of a particle is x - y plane is described by the variables x = at3 and y = 2at. Then the acceleration of the particle ______.
A displacement vector, at an angle of 30° with y-axis has an x-component of 10 units. Then the magnitude of the vector is ______.
