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Q.1: In case of planets the necessary acceleration is provided by——-?
- Gravitational force
- Frictional force
- Coulomb force
- Centripetal force
Q.2: If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4. Its angular speed is——-?
- 4 rad. S-1
- 5 rad. S-1
- 1.6 rad. S-1
- 2.8 ms-1
Q.3: A body can have constant velocity when it follows a——-?
- Elliptical path
- Circular path
- Parabolic path
- Rectilinear path
Q.4: A body moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R the ration of displacement to the covered path will be——-?
- 2π R
Q.5: The angular speed for daily rotation of the earth in rad S-1 is——-?
- 7.3 x 10 radians/second
- 7.3 x 5 radians/second
- 3.7 x 10 7.3 x 5 radians/second
- 7.3 x 10-5 radians/second
Q.6: When a wheel 1 m in diameter makes 30 rev min the linear speed of the point on its rim in ms-1 is——–?
Q.7: A cyclist cycling around a circular racing track skids because——-?
- the centripetal force upon him is less than limiting friction
- the centripetal force upon him is greater than limiting friction
- the centripetal force upon him is equal to the limiting friction
- the friction between the tyres of the cycle and road vanishes
Q.8: If a wheel of radius r turns through an angle of 30° then the distance through which any point on its rim moves is——-?
- π /3 x r
- π/6 x r
- V/30 x r
- π / 180 x r
Q.9: In an angular motion, Newton’s second law of motion is——-?
- Στ = I α
- All above
Q.10: The angular speed of seconds hand of a watch in rads-1 is——-?