Class XI

A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion takes place in a plane. It follows that
  1. its acceleration is constant
  2. its motion is circular
  3. its velocity is constant
  4. its motion is linear
One o (1o) is equal to?
  1. 0.1745 rad
  2. 0.01745 rad
  3. 0.001745 rad
  4. 7.1745 rad
Kicked or thrown balls, jumping animals, object thrown from a window, a missile shot from a gun, a bomb released from a bomber plane, etc are all example of?
  1. Mechanical energy
  2. Projectiles
  3. Velocity
  4. Machine
A body of mass 500 gram is rotating in a vertical circle of radius 1 m. What is the difference in its kinetic energies at the top and the bottom of the circle?
  1. 4.9 J
  2. 19.8 J
  3. 2.8 J
  4. 9.8 J
The range of the projectile depends on the square of the initial velocity and?
  1. cosine of twice the project angle θ
  2. sine of twice the projection angle θ
  3. sine of thrice the projection angle θ
  4. cot of twice the projection angle θ
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