Options:
- A. ?
- B. ?/2
- C. ?/30
- D. ?/180
View Answer
C. ?/30
Physics
The shaft of a motor rotates at a constant angular speed of 360rev/min. Angle turned through in 1 sec in radian is________________?
Options:
- A. ?
- B. 3?
- C. 6?
- D. 12?
View Answer
D. 12?
What is the outward force acting on a mass of 10 kg when rotating at one end an inelastic string 10m long at speed of 1m/s ?
Options:
- A. 1N
- B. 10N
- C. 2N
- D. 100N
View Answer
A. 1N
If we whirl a stone at the end of a string in the vertical circle, it is likely to break when the stone is________________?
Options:
- A. At the highest point
- B. At the lowest point
- C. At any point during motion
- D. At the point where gravity is not acting
View Answer
B. At the lowest point
Moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R, the ratio of displacement to the covered path will be_______________?
Options:
- A. ?R
- B. 2?R
- C. 0
- D. 4?R
View Answer
C. 0
A man of weight W is standing on an elevator which is ascending with an acceleration a. The apparent weight of the man is_______________?
Options:
- A. mg
- B. mg
- C. mg + ma
- D. mg
View Answer
C. mg + ma
Who discovered the inverse square law for gravity ?
Options:
- A. Einstein
- B. Galileo
- C. Newtons
- D. Plank
View Answer
C. Newtons
In case of planets the necessary acceleration is provided by______________?
Options:
- A. Gravitational force
- B. Frictional force
- C. Coulomb force
- D. Centripetal force
View Answer
A. Gravitational force
The planet nearest to the earth is______________?
Options:
- A. Venus
- B. Mercury
- C. Uranus
- D. Sun
View Answer
A. Venus
If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4. Its angular speed is______________?
Options:
- A. 4 rad. S-1
- B. 5 rad. S-1
- C. 1.6 rad. S-1
- D. 2.8 ms-1
View Answer
B. 5 rad. S-1