Question
Give examples where:
  1. The velocity of a particle is zero but its acceleration is not zero.
  2. The velocity is opposite in direction to the acceleration.
  3. The velocity is perpendicular to the acceleration.

Answer

Particle thrown upwards:
  1. At highest point.
  2. While going up.
  3. At the highest point of projectile.

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

The coil of a moving-coil galvanometer keeps on oscillating for a long time if it is deflected and released. If the ends of the coil are connected together, the oscillation stops at once. Explain
Describe experiment of two coils explaining electromagnetic induction.
State history of "Discovery of Electromagnetic Induction'' and its contribution in progress of today's civilisation.
A 1cm object is placed perpendicular to the principal axis of a convex mirror of focal length 7.5cm. Find its distance from the mirror if the image formed is 0.6cm in size.
If work function of caesium metal is 2.14 eV , then calculate its threshold frequency.
Consider Experiment 6.2. (a) What would you do to obtain a large deflection of the galvanometer? (b) How would you demonstrate the presence of an induced current in the absence of a galvanometer?
A potential difference of 12 volt is applied across the ends of 0.24 m long conductor. Calculate the drift velocity of the electrons. Mobility of electron is $5.6 \times 10^{-6} m^2 V^{-1} s^{-1}$.
A mass of 6 × 1024kg (equal to the mass of the earth) is to be compressed in a sphere in such a way that the escape velocity from its surface is 3 × 108m/s. What should be the radius of the sphere?
a. An electron moving horizontally with a velocity of $4 \times 10^4 m / s$ enters a region of uniform magnetic field of $10^{-5} T$ acting vertically upward as shown in the figure. Draw its trajectory and find out the time it takes to

Image

b. A straight wire of mass 200 g and length 1.5 m carries a current of 2 A. It is suspended in mid air by a uniform magnetic field B. What is the magnitude of the magnetic field?
Find the maximum Coulomb force that can act on the electron due to the nucleus in a hydrogen atom.