If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is

Q: If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is

  1. 30°
  2. 60°
  3. 90°
  4. 120°

Ans: 4.120°

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A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.)

Q: A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.)

  1. PW tanα
  2. PW tan(α + φ)
  3. PW (sinα + μcosα)
  4. P = W (cosα + μsinα)

Ans: 3. PW (sinα + μcosα)

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The range of projectile on a downward inclined plane is __________ the range on upward inclined plane for the same velocity of projection and angle of projection.

Q: The range of projectile on a downward inclined plane is __________ the range on upward inclined plane for the same velocity of projection and angle of projection.

  1. Less than
  2. More than
  3. Equal to

Ans: 2. More than

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The velocity ratio in case of an inclined plane inclined at angle θ to the horizontal and weight being pulled up the inclined plane by vertical effort is

Q: The velocity ratio in case of an inclined plane inclined at angle θ to the horizontal and weight being pulled up the inclined plane by vertical effort is

  1. sin θ
  2. cos θ
  3. tan θ
  4. cosec θ

Ans: 1. sin θ

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Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the ball with velocity v is made to struck the second ball. Both the balls after impact will move with a velocity

Q: Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the ball with velocity v is made to struck the second ball. Both the balls after impact will move with a velocity

  1. V
  2. v/2
  3. v/4
  4. v/8

Ans: 2. v/2

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