Question
If a particle is accelerating, it is either speeding up or speeding down. Do you agree with this statement?

Answer

Acceleration doesn’t mean speeding up or down. It means change of velocity either change in magnitude or direction.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Why is spring made of steel and not of copper?
How does the mass vary when the velocity is varied? What is mass-energy equivalence? Give an example.
A barometer tube is 80cm long (above the mercury reservoir). It reads 76cm on a particular day. A small amount of water is introduced in the tube and the reading drops to 75.4cm. Find the relative humidity in the space above the mercury column if the saturation vapour pressure at the room temperature is 1.0cm.
It is heard sometime that mercury is used in defining the temperature scale because it expands uniformly with temperature. If the temperature scale is not yet defined, is it logical to say that a substance expands uniformly with temperature?
The surface of water in a water tank on the top of a house is 4m above the tap level Find the pressure of water at the tap when the tap is closed Is it necessary to specify that the tap is closed? Take g = 10m/s2.
Explain why:
A body with large reflectivity is a poor emitter.
Write an expression for the moment of inertia of a ring of mass M and radius r.
  1. About an axis passing through its centre and perpendicular to its plane.
  2. About its diameter.
  3. About a tangent in its own plane.
  4. About a tangent perpendicular to the plane of the ring.
State Hook's law. Calculate the fractional AV compression, $\frac{\Delta\text{V}}{\text{V}},$ of water at the bottom of the ocean having depth 3000m. The bulk modulus of water is 2.2 × 109Nm-2. (Take g = 10ms-2)
A aircraft executes horizontal loop of radius 1.00km with a steady speed of 900km/ h. Compare its centripetal acceleration with the acceleration due to gravity (g).
In case of an oscillating simple pendulum what will be the direction of acceleration of the bob at:
  1. The mean position.
  2. The end points?